Scutigera, a genus of Myriapoda, iii. 546, et seq.



GENERAL INDEX.



Scutigcra livida, iii. 547. '

Scutigeridtr, a family of Myriapoda, iiL 516, el seq.

cliaracters of the family, iii. 546.
SctUipedes of Scopoli, i. 2b6.
Scutula Wallrothii, si>ermagonia of, s. 230.

pyciiidis of, s. 231.

Scyllcea pelagica, nervous system of the, iii. 606.
Scyphia, a family of Porifera, iv. 65.
characters of the family, iv. 65.
Scyphits of cochlea, ii. 552.
Sea, phosphorescence of the, iii, 198, el seq. See LUMI-

Noi'iNEss, AMMAL.
physical effects produced by a particular display of the

fuminousness of the sea, iii. 198.
Sea-anemone, digestive organs of the, s. 29fi.
Sea-gull (Larus cyanorhynchus), nervous system of the,

iii. 622.
Sea-jelly, or sea-nettle, i. 35. See ACALEPH^K.

digestive organs of the, & 297.
Sea-mouse, description of the, i. 617.

ciliary motion in the, i. 618.

Sea-scurry, condition of the blood after death from, i. 418.
Sea-sicknt'sa, iv. 1174.

Sea-urchin, ii. 30, et seq. See ECIIINODERMATA.
ciliary motion in the, i. 615. fi!7. See CILIA.
Sea-water, its absorption of the rays of light transmitted

through it, and loss of transparency, iv. 1438.
Seal, common (Phoca vitulina), organs of voice of the, iv.

1491.

\Veberian organ in the, iv. 1418.
grey ,Halichcerus gryphus), dentition of the, iv. 915.
Seasonings of food, s. 395. See FOOD.
Seasons, effect of the, on the quantity of carbonic acid gas

in the expired air, iv. 349.
on the production of animal heat, ii. 659.

681.

Sebaceous glands, i. 216.
of the nose, iii. 729.
follicles of the vulva, s. 711.
Sebum, i. 57.

Second intercostal nerve, i. 217.
Secreting canals, ii. 487, 488.
SECRETION, i. 144; iv.439.
definition, iv. 439.
general observations, iv. 439.

affinity between the functions of nutrition and se-
cretion, iv. 440.

animal and vegetable secretions compared, i. 135.
organs of secretion, iv. 441.

development of simple cells, iv. 441.
excretory organs of animals, iv. 443.
absorbent system, iv. 4J4.
biliary apparatus in various animals, iv. 445.
composition and development of secreting struc-
tures, iv. 455.

secreting structure of the testicle, iv. 977.
mucous, lubricating the bladder, i. 386.
sources of the demand for the secreting function, iv.

455.

decay of animal structures, iv. 456.
periodical decay, iv. 456.

carbonic acid the first product of decay, iv. 456.
removed from living bodies by the lungs

and skin, iv. 456.

water removed by the skin, iv. 456.
nitrogen thrown off' by decaying bodies, iv.

4>ri.

hydrocarbon of biliary secretion, iv. 453.
nature of faecal matter, iv. 458.
existence of the elements of secretions in the blood, iv.

459-

metastasis of secretion, iv. 461.
urine, iv. 461.
biliary secretion, iv. 462.
secretion of milk, iv. 461. 463.

vicarious secretion of milk, iv. 463.
menstrual flux, iv. 463.

vicarious menstruation, iv. 464.
influence of the nervous system on the secreting

process, iv. 464.
on the secretion of milk, iv. 464.

by mental emotion, iv. 464.
on the secretion of saliva, iv. 466.

ga>tric juice, iv. 466.
tears, iv. 4o6.

changes in the state of nutrition arising from in-
jured nerves, iv. 468-

theories of the influence exerted by the nervous
system on the nutritive and secretory functions,
iv. 469.
three ways in which secretions are probably separated

from the body, iii. 503.

proximate analysis of individual secretions, iii. 807.
of the urine, iii. 807.
of the blood, iii. 809.
of milk, iii. 811.
of bile, iii. 811.
of saliva, iii. 812.
Secretions of Carnivora, i. 481. See CARNIVORA.

follicles producing peculiar secretions, i, 481, 482.
of Polygastria, iv. 16.
of Mammalia, iii. 235.



Seeds, dormant vitality of, iii. 156.

Seeing. See VISION.

Segmentation of the ovum of animals, process of, s. [138.3

See OVUM.

Selaginella, vegetative system of, s. 243.
SeUa turcica, i. 726.
SEMEN, ii. 457 ; iv. 472.
definition, iv. 472.

histiological elements of the semen, iv. 472.
spermatozoa, iv. 472.

liquor scminis, iv. 472.

periodical development of the spermatozoa and

testicles, iv. 473.
rutting period, iv. 473.
form, development, and history of spermatozoa,

iv. 474; s. [137.]
in Man, iv. 474.
in Mammalia, iv. 475.
in Aves, iv. 477-
in Reptilia, iv. 480.
in Pisces, iv. 483.
in Mollusca, iv. 484.

in Cephalopoda, iv. 485.
in Gasteropoda, iv. 485.
in Acephala, iv. 487.
in Articulata, iv. 488.
in Insecta, iv. 488.
in Arachnida, iv. 490.
in Myriapoda, iv. 492.
in Crustacea, iv. 493.
in Annelida, iv. 49ti.
in Bryozoa, iv. 497.
in Rotifera, iv. 498.
in Radiata, iv. 498.

in Echinodermata, iv. 498.

in Acalephaz and Acanthozoa, iv.

499.

in Infusoria, iv. 499.
general conclusions respecting the morphology and

development of spermatozoa, iv. 499.
organisation of the spermatozoa, iv. 502.
motions of the spermatozoa, iv. 502.
chemical properties, ii. 458; iv. 505.
circumstances on which the fecundating property of

the seminal fluid depends, ii. 461.
course of the ejaculated seminal fluid within the female

organs, ii. 464.
office of the Fallopian tube in the reception and trans-

mission of the spermatic fluid, s. 607.
power by which the semen reaches the oviduct, s.

607.
is material contact of the semen and ovum necessary

for fecundation ? ii. 462.
mode ef discharge of the semen, ii. 458, 459.
sources whence the semen is derived, ii. 457.
vesicular seminales, ii. 458. See also VESICI'LE SEMI-

NALES.

physiological office of the semen, iv. 507.
See also OVUM ; SEMEN.
Setnibulb, or bulb, of the vagina, s. 712.
Semicircular canals, ii. 530. 537.
ampullae, ii. 530, 531. 537.
horizontal, ii. 531.
posterior, ii. 531.
superior, ii. 531.
development of the, ii. 558.
function of the, ii. 569. 577.
process, i. 733.
taenia, iii. 675.
Semidiuma, a section of Insects of the order Lepidoptera,

ii. 867.

characters of the section, ii. 867.
Semilunar, or lunar, bone of carpus, ii. 505 ; iv. 1506.

articulations, ii. 505.

Semilunar cartilages of knee-joint (cartilagines falcatac, s.
lunatae), iii. 45.
nglion, ii. 298 ; s. 641, note.
lds, iii. 84.

in comparative anatomy, iii. 84.
plica, iii. 80.

or sigmoid valves of arteries, i. 223.
valves of right ventricle, ii. 581.

of left ventricle, ii. 584.
Semimembranosus muscle, iv. 61 ; 8. 137.

nerves for the, iv. 768.
Seminal cercariae, ii. 112. See EHTOZOA.
vesicles. See VESICI'LJE, SEMINALES.
Semi-spinalis dorsi muscle, i. 372.
Semi-tendinosus muscle, ii. 264 ; iv. 61 ; s. 137.

nerve for, iv. 767.

Semitic, or Syro- Arabian, group of languages, iv. 1347.
characters of the Semitic nations, iv. 1347.

complexion of the, iv. 1333. See VARIETIES OP

MANKIND.
Semnocebus, a genus of Quadrumana, iv. 215, ft seq. See

QUAORUMANA.

characters of the genus, iv. 215.
Semnopithecus, a genus of Ouadrumana, iv. 195, et seq.

See Qi APRI MANA.
characters of the genus, iv. 195.
Semnopithecus, digestive organs of the, s. 304.
Senegal, characters of the inhabitants of, iv. 1352, 1353.



gan
fol



856



GENERAL INDEX.



SENSATION, i. 144 ; Hi. 723 A ; iv. 508.
definition, iv. 508.
cause of, iii. 720 K.

common and special sensations, iv. 509.
objective and subjective sensations, iv. 510.
reflex sensations, iv. 510.

the optic thalami the centre of, iii. 722 M, 723 E.
probable modus operandi of the brain in, iii. 711.
See also NERVOUS SYSTEM, Physiology of; HEARING ;

SMELL ; TASTE ; TOUCH ; VISION.
animal and vegetable sensation compared, i. 137.
apparatus of sensation in Crustacea, i. 7'~i2.
in Annelida, i. 167.
Senses, the, in infancy, i. 72.
SENSIBILITY, iv. 510.
definition, iv. 510.
anatomical condition necessary for the development of

greater or less sensibility, iv. 511.
modifications of sensibility, iv. 511.
degrees of nervous sensibility in various parts of the

body, iii. 588.

common sensibility, iii. 588.
special sensibility, iii. 589.
Sensitive nerves, iii. 720 H.

plant, iv. 679.

Sensorium, iv. 677, et seq. See SLEEP.
Sensorium commune of Prochaska, iii. 720 K ; 722 A. .

its functions and seat, iii. 721 E.
Sepia, the Italian pigment so called, i. 536.

hexapodia, electricity of the, ii. 82.
Sepiadce, or cuttle-fishes, i. 521.
characters of the family, i. 521.
ova of the Sepia, s. [105], [106].
fossil shells of the, i. 520.

Septum, or cuttle-bone, of cuttle-fish, i. 531. 546.
Septa aponeurotic, i. 217-

of the urinary bladder, i. 390.
Septum nasi artery, i. 487.
Septual branches of olfactory nerve, iii. 732.
Septum, antero-posterior vertical, of the chest, iv. 1.
cervico-thoracic, iii. 570.
crurale, i. 13.
lucidum, iii. 674, 675.
layers of, iii. 674.
ventricle of, iii. 674.
median fibrous, of tongue, iv. 1124.
mobile nasi, iii. 725, 726.
nasal, i. 731.

pectiniforme penis, iii. 913.
of the perineum, artery of the, iii. 928.
scroti, iv. 438.
thoracico-cervical, iv. 816.
transyersum, ii. 2. 538.
ventriculorum, ii. 584.

thickness of the, ii. 584.
abnormal conditions of the, ii. 632*
Sequestrum, or dead bone, i. 455, 456.
Senfurm, or Indo-Chinese, group of languages, iv. 1347.

characters of the Seriform nations, iv. 1350.
Serolin, method of determining the presence of, in organic

substances, iii. 798.
in the composition of the blood, i.'411.
Serous cavities, calcareous deposits in the, iv. 90.
SEROUS AND SYNOVIAL MEMBRANES, iv. 511.
organisation of, i. 51.
elasticity of, ii. 60.

white and yellow fibrous tissue, iv. 512.
areolar tissue, iv. 513, 514.
bursae, iv. 513.

subcutaneous bursae, iv. 514.

covering of the internal surface by a cell- growth,

iv. 514.

character of the cells, iv. 515.
arrangement of the cells, iv. 515.
subtendinous bursae, iv. 516.

cartilage corpuscles, iv. 517.
eynovial membranes, i. v51 ; iv. 518.
epithelium of, iv. 519.
vessels of, iv. 519.
characters of, i. 251.

relation to other articular structures, i. 251.
analogy between serous and synovial membranes, i. 251.
secretion of the unguen articulare, i. 253.
serous membranes, iv. 522.

description of these membranes, iv. 523.
basement membrane, iv. 523.
areolar tissue, iv. 524.

subserous cellular tissue, iv. 524.
vessels, iv. 524.
lymphatics, iv. 525.
nerves, iv. 525.

choroid plexus, iv. 525.
development of serous membranes, iv. 526.
in the animal kingdom, iv. 526.
in the human foetus, iv. 526.
development by friction, iv. 526.

physiology of the serous and synovial membranes, iv. 527.
contrast of serous and synovial membranes, iv. 528.
morbid anatomy of serous and synovial membranes, iv.

530.
serous or dropsical effusions, iv. 530.

physical and chemical properties, iv. 531.



SEROUS AND SYNOVIAL MEMBRANES continued.

inflammatory or fibrinous effusions, iv. 532.
characters of, iv. 533.
first stage, iv. 533.
second stage, iv. 533.

effusion of plastic fluid, iv. 533.

composition of this fluid, iv. 533.
organisation of the effusion, iv. 535.
tubercle, iv. 537.
cancer, iv. 537.
ossification, iv. 537-
cysts, iv. 538.
diseases of the subserous areolar tissue, iv. 538.

of synovial membrane of the elbow-joint,

loose cartilages, iv. 538.

Serous membrane of the abdomen. See PERITONEUM.
or peritoneal, lamina; of the bladder, i. 380.
adventitious serous tissue, iv. 140.
Scrpentidce, a family of Reptilia, iv. 265, et seq.
Serpents, different modes of progression of, iii. 447.

powers of climbing, swimming, and springing, iii. 447,

448.

muscular system, iii. 542.
eyelids, iii. 96.
urine of, iv. 1281.
Serrated membrane of Gordon, or ligamentum dentatum.

iii. 6i5.

office of the, iii. 646.

Serratus magnus muscle, i. 5. 361 ; iv. 755.
magnus anticus muscle, iv. 576.
minor anticus muscle, i. 359.
posticus inferior muscle, i. 371.

superior, i. 371.

Sertularia geniculata, a species of Polypifera, iv. 48.
intimate organisation of, iv. 49.
mode of growth, iv. 49.
reproduction of, iv. 49, 50.

mode of reproduction of, s. 19.
luminousness of, iii. 198.

Sertularidte, a family of Polypifera, iv. 20. 48.
characters of the family, iv. 20. 48.
genera, iv. 20. 48.
ova of, s. [126.]

Serum of the blood, i. 404. See BLOOD.
analysis of the, iii. 483.
cholesterine in-the, iv. 4fiO.
effusion of serum into the sub-arachnoid and arachnoid

cavities, iii. 717.

and into the cellular tissue, i. 515.
Sesamoid body, ii. 581.
SESAMOID BONES, iv. 541.

in human anatomy, iv. 541.
structure, iv. 541.
microscopic examination, iv. 542.
development, iv. 542.
disease and injury, iv. 542.
other human sesamoi'd bones, iv. 542.
comparative anatomy, iv. 542.

other sesamoid bones in Solipedes and other Mam-
malia, iv. 543.

use of sesamoid bones, iv. 543.
Sesamoid cartilages, iii. 727.
Seta; of animalcules, iv. 6.
SEVENTH PAIR OF NERVES, iv. 543.
origin, iii. 684.
connexions, iii. 684.
facial and auditory nerves, iv. 543.
auditory nerve, iii. 684 ; iv. 543.
its apparent origin, iv. 543.
course, iv. 544.
facial nerve, or portio dura of the seventh pair, iii. 684 ;

iv. 544.

description, iv. 544.
course, iv. 545.

in the cranium, iv. 545.
portio intermedia, iv. 545.
in the temporal bone, iv. 545.
connexion with the superficial petrosal nerve, iv.

545.
branch from the facial to the membrane which

closes the fenestra ovalis, iv. 546.
filament to the stapedius muscle, iv. 546.
chorda tympani, iv. 546.

its connexion with the facial, iv. 546.
connexion of the facial and vagus nerves, iv. 546.
course external to the cranium, iv. 54fj.
branches, iv. 546.

posterior auricular nerve, iv. 546.
digastric nerve, iv. 547.
stylo-hyoid nerve, iv. 547.
temporo-facial division, iv. 547.
temporal branches, iv. 547.
orbicular or supra-orbicular branches, iv.

547-

infra-orbital filaments, iv. 547.
buccal branches, iv. 547.
cervico-facial division, iv. 548.
supra-maxillary part, iv. 548.
infra-maxillary part, iv. 548.
minute anatomy of the seventh nerve, iv. 548.
in the human subject, iv. 548.



GENERAL INDEX.



857



SEVENTH PAID OF NERVES continued.

general results of examinations in comparative

anatomy, iv. 550.

phy-iology of the seventh nerve, iv. 551.
facial nerve, iv. 551.

effect of section of the facial nerve on the sense

of smell, iv. 552.
effect of division of the portio dura on the eye,

iv. 653.
influence of the facial nerve on the sense of

taste, iv. 553.

and on the sense of hearing, iv. 554.
the facial nerve a nerve of motion, iv.

66f

Sexes, structural differences of the, ii. 439.
in infancy and youth, ii. 439.
local changes attendant on puberty, ii. 439.
in the female, ii. 439.
in the male, ii. 439.
See also GENERATION; OVARY; OVUM; UTERUS AND

ITS APPKM>A(,KS.
Sexual desire, ii. 441

not always entirely destroyed by castration, ii. 443.

considered a mental emotion, iii. 722 Q.

Gall's views of the connexion of the cerebellum with

the sexual functions, iii. 722 S.
Sexual malformation. See HERMAPHROUITISM.

reproduction, ii. 434. See GENERATION; OVUM.
Sharks, iii. 963, et seq., 981.
Sheath, arterial, i. 221.

brachial, anterior, L 217.
posterior, i. 217.
femoral, ii. 237 240.
Sheep, anatomy of the, s. 508.
cranium of, s. 512 514, 515.
jaw-bone of, s. 515.
hyoid bones of, s. 526.
foot of, structure of, s. 531.
intestine of, s. 539.
pelvis of, s. 157.

globular cyst developed in the brain of, ii. 118.
variation in the breeds of sheep under various circum-
stances, iv. 1312.
milk of the, iii. So:?.

analysis of, iii. 36-2.
Shelahs, or mountaineers of Southern Morocco, characters

of the, iv. 1357.
Sin LI,, iv. 556.

definition, iv. 556.

general observations, iv. 557.

shells of Mollusca, iv. 557-

Echinodermata, iv. 556.
Crustacea, iv. 569.

periodical exuviation of the shell in Crus-
tacea, iv. 571.
shell-substance, membranous, of Dr. Carpenter, s.

489.
Shells of Cephalopoda, i. 543.

of Gasteropoda, ii. '579, et seq. See GASTEROPODA.
of Tunicata, iv. 1193.
design in the formation of shells, iii. 414.
Shin, or crest of tibia, iii. 45.
SHOI LOER-JOINT (normal anatomy), iv. 571.
limits of region, iv. 571.

elements of which this region is composed, iv. 571.
supra-acromial twigs, iv. 571.
deltoid muscle, iv. 571.
scapulo-humeral articulation, iv. 572.

1. bones, iv. 573. See EXTREMITY.

glenoid cavity, iv. 573.

head of the humerus, iv. 573.

the tuberosities, iv. 573.

2. structures which facilitate motion in the joint,

iv. 573.

a. glenoid ligament, iv. 573.

b. cartilage of incrustation, iv. 573.

3. connecting media, iv. 574.

capsular ligament, i. 359; iv. 574.
synovial membrane, iv. 575.
mechanical functions of the shoulder-joint, iv. 576.

1. flexion, iv. 576.

2. extension, iv. 576.

3. adduction, iv. 576.

4. abduction, iv. 576.

5. circumduction, iv. 577.

6. rotation, iv. 577.

Sn'>iLr>;.R-joiNT (abnormal conditions of the), iv. 577.
Section I. produced by Disease, iv. 577.
acute arthritis of the shoulder, iv. 577.
symptoms, iv. 577.
anatomical characters of, iv. 577-
chronic arthritis of the shoulder, iv. 577.
simple chronic arthritis, iv. 578.
symptoms, iv. 578.
first, second, third, and fourth stages, iv.

578.

cases, iv. 578, 579.
anatomical characters of, iv. 580.
cases, iv. 581,582.

post-mortem examination, iv. 581,

582.
anchylosis of the shoulder-joint, iv. 583.



Sllpp.



SHOULDER-JOINT continued.

chronic rheumatic arthritis of the shoulder-joint

iv. 584.

symptoms, iv. 584.
diagnosis, iv. 585.
anatomical characters, iv. 585.
bones, iv. 86.
cases, iv. 589, et seq.

cases of partial luxation which have been pub-
lished as the result of accident, but which
arc considered to be specimens of chronic
rheumatic disease, iv. 590600.
Section II. produced by Accident, iv. 600.
Fractures, iv. 600.

A. Fracture of the acromion process, iv. 600.

mode of union, iv. 600.

B. Fractures of the coracoid process, iv. 600.

C. Fractures of the neck of the scapula, iv.

601.
diagnosis, iv. 601.

D. Fracture of the superior extremity of the

humerus, iv. 601.

1. intra-capsular fracture of the humerus,

iv. 601.
dissection, iv. 602.

2. extra-capsular fracture through the lu-

bercles, iv. 602.
symptoms, iv. 603.
case, iv. 603.

post-mortem examination, iv. 603.
diagnosis, iv. 603.

3. Fracture of the superior extremity of

the humerus through the line of
junction of the e.nphysis with the
shaft of the bone, or close to this
line, iv. 603.
case, iv. 604.

4. Fracture of the surgical neck of the

humerus below the tuberosities and
original line of junction of the epiphy-
sis with the shaft of the bone, iv. 605.
Dislocations, iv. 605.

1. dislocation downwards and inwards into the

axilla, iv. 606.
symptoms', iv. 606.
anatomical characters of, iv. 607-
case, iv. 607.

2. dislocation forwards, iv. 609.

3. dislocation backwards of the head of the

humerus on the dorsum of the scapula,
the result of accident, iv. 611.
symptoms, iv. 611.
case, iv. 611.

diagnosis between fractures of the superior extre-
mity of the humerus and dislocations of the
shoulder. joint, iv. 613.

dislocation of the head of the humerus, accom-
panied with fracture of the neck of the humerus,
iv. 614.

muscles, iv. 615.

laceration of the tendon of the sub-scapularis mus-
cle, iv. 615.

cedematous swelling of the arm and forearm, ac-
companying dislocation of the head of the hume.
rus, iv G15.

partial or general paralysis of the muscles of the
arm as a consequence of dislocation of the head
of the humerus, iv. 615.
alterations of the nerves, iv. 616.
artery, iv. 616.
luxation of the head of the humerus complicated

with lesion of the axillary artery, iv. 616.
Section III. Congenital malformation of the shoulder-
joint, iv. 617.
general remarks, iv. 617.

anatomical characters of congenital malformation
of the shoulder-joint, with displacement of
the head of the humerus inwards, iy. 618.
case, iv. 618.

anatomical examination of the joint, iv. 619.
congenital malformation of the shoulder-joint, wi;h
displacement of the head of the humerus on
the dorsum of the scapula, iv. 619.
case, iv. 620.
Shrews, pelvis of, s. 164.
S/irimps, muscles of, iii. 540.

mode of progression of, iii. 436.

Siah-P6s/i, a tribe of Northern India, physical characteris-
tics of, iv. 1336.

Sitimung. anatomy of the, iv. 199, et seq.
Siamese Twins, ii. 317 ; iv. 970.

portrait of one ef them, iv. 1323.
Sidnyum, a genus of Tunicata, iv. lll'O, ct se/.

characters of the genus, iv. 1190.
Sighing, probable causes of, iii. 722 K.
Sight. See VISION.

near sight. See Myopia ; VISION.
long sight. See Presbyopia ; VISION.
Sight, organ of. See EYE.
Sigillina, a genus of Tunicata, iv. 1189, el seq.

characters of the genus, iv. 1189.
SigUltna australis, iv. 1190.

3 K



858



GENERAL INDEX.



Sigmoid cavity, great, ii. 66. 162.

lesser, ii. 66.
of the ulna, iv. 229.
flexure, s. 362. 365.

use of, s. 366.
notch, ii. 214.
valves, ii. 581.

of arteries, i. 223.
^/'Mr-vessels, or salivary glands, of the larva; of insects, ii.

973.

Silkworm moths (Bombycidael, ii. 867.
SM-worms (Liparis mort), ii. 867. 874.
Siluridce, a family of Fishes, iii. 957.
Silurus electricus of Linnasus. See Malaptcrurus electri-

cus.
Simla (ape), a genus of Quadrumana, iv. 195, et seq. See

QlJADRUMANA.

characters of, iv. 195.
Simla satyrus (ourang-oetan), anatomy of the, iv. 198, et

troglodytes (chimpanzee), anatomy of the, iv. 198,

el seq.

pelvis of the, s. 151.
Singing, art of, iv. 1485.
Sinuositas mastpidea, s. sinus mammillaris, s. antrum

mammillare, ii. 546. 559.
Sinus or Sinuses :

of acetabulum, ii. 777.
ampullaceus, ii. 530. 537.
pocularis, iv. 151.

development of, iv. 153.
articularis (glenoid cavity of scapula), ii. 157-
basilar, i. 7i7.
of bones, i. 435.
cavernous, iii. 633.
cerebral, iv. 1374.
circular, iii. 633 ; iv. 1451.
commune, ii. 537. 569.

function of the, ii. 569.
of coronary vein, iv. 1415.
great, ii. 597.

common, of membraneous labyrinth, ii. 527.
cranial, iv. 1387.
of the dura mater, iii. 631.
frontal, i. 729, 730 ; iii. 725.

calculus of, iv. 82.
in the walls of veins, iv. 1380.

functions of these sinuses, iv. 1381.
inferior falcis, iii. 631.
* of internal jugular vein, iv. 1406.

lateral, i. 732; iii. 632 ; iv. 1382 .
longitudinal, inferior, iii. 629. 631.
superior, iii. 631.
anterior, iv. 1410.
of frontal bone, i. 729.
spinal, iii. 630.
mammillaris, ii. 546.
maxillary, ii. 209.
occipital, iii. 629. 632.
osteum, ii. 538.
petrosal, superior, iii. 632.

inferior, iii. 632 ; iv. 1406.
pocularis, iv. 1252.

prostatic, iv. 1246. See VESICUL.V PKOSTATICA.
of Santorini. iii. 724.

seu cavum, laryngis. See Rima glottidis.
spheroidal, iii. 725.
spinal, iii. 630.
strait, iii. 631.
transverse, iii. 632.
torcular Herophili, iii. 631.
of Valsalva, ii. 582. 584.
of vena ports, iv. 1414.
venosi of the human spleen, iv. 790.
venosus, ii. 579.

of occipital bone, i. 751.
Siphonia, a family of Porifera, iv. '5.

characters of the family, iv. 65.
Siptncttlus, the, iii 537.

muscles of the, iii. 537.
Siren lacertina, muscles of the, iii. 543.

vertebra? in the, i. 93, 94.
S/Vcn-like monsteis, iv. 964.

siren formation of pelvis, s. 208.
Sirenonielia, iv. 964.
Sivatherium, cranium of the, s. 518.
SIXTH PAIR OF NERVES, iii. 684. 787 ; iv. 621.
definition, iv. 621.
visible origin of the nerve, iv. 621.
branches, iv. 621.

to sympathetic, iv. 621.
to ophthalmic branch of the fifth, iv. 621.
to the ciliary or lenticular ganglion, iv. 622.
physiology of the sixth nerve, iv. 622.
comparative anatomy, iv. 622.

paralysis of the nerve from disease in the neighbour-
hood, iv. 622.
Size, in the organic and inorganic worlds compared, i.

1 18.

Skates, muscles of the, iii. 543.
SKELETON, i. 141 ; iii. 821; iv. 622.
definition, iv. 622.



SKELETON continued.

endo-skeleton, iii. 823. See OSSEOUS SYSTEM.

skeleton of a crocodile, iii. 822.
exo-skeleton, iii 844 See OSSKOI'S SYSTEM.
law of unity in variety, iv. 622.

Prop. I. Vertebras are unequal quantities, iv. 624.
II. even the one vertebra is not of equal quan-
tity in all individuals of the same species,
iv. 625.

III. all vertebrae contain a greater or less

amount of known elemental pieces, iv.
625.

IV. the dorsal vertebra of human anatomy is an

artificial figure, iv. 625.
V. the cervical vertebra developes the costal

appendages also, iv. G'-d.
VI. all the cervical vertebree develope costal

appendages, iv. 6^'7,
VII. the lumbar vertebra developes the costal

appendage, iv. 627.
VIII. all the lumbar vertebras develope costal

appendages, iv. 628.

IX. the sacral vertebra? develope costal appen-