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Corneocyclas variabilis Prime.

Pisidium -variabile PRIME, Proc. Boston Soc. Nat. Hist., iv, p. 163, 1851 ;
Mon. Am. Corbie., p. 66, figs. 69, 70, 1865.

Range. Eastern United States, north of Virginia ; Colorado, and
northward; Seattle, Wash.

Pine Creek, Manitoba ; Stewart River, Yukon District ( fide Sterki) .

Corneocyclas abdita Haldeman.

Pisidium abditum HALDEMAN, Proc. Acad. Nat. Sci. Phila., I, p. 53, 1841.
PRIME, Mon. Am. Corbie., p. 68, figs. 72, 73, 1865.

Range. North America, from Honduras northward to Alaska.
Marl Lake, Anticosti ! Lake Superior in 4 to 13 fathoms near
Ignace Island; Manitoba; Assiniboia at Qu'Appelle ! Alberta, at
Laggan, Red Deer, Olds, McLeod, Battle River, up to 5,200 feet
elevation ; east slope of the Sierra Nevada up to
7,100 feet; in Colorado up to 9,300 feet; west
slope of the Sierra below 5,300 feet in Califor-
nia ; Seattle, Wash. ; in Alaska at Seldovia, Cook
Inlet ! Coal Harbor ! Unga Island, Shumagins,
in small pools on the tundra ; Akun Island !
Aleutians ; the Yukon River, 30 miles below

orneocy- ^ mO uth of the Tanana ! and Bering Island,
das abdita Hald.

Bering Sea !

This is the most common and widespread species, out of the
varieties of which many nominal species have been made.


* Corneocyclas abyssorum Stimpson.

Pisidium (sp.) SMITH and VERRILL, Am. Journ. Sci., n, p. 448, Dec., 1871.
Pisidium abyssomus (STM.) HOY, Trans. Wisconsin Acad. Sci., i, p. 100,

1872 (err. typ.).
Pisidiiim abditum var. abyssorum STIMPSON, S. I. Smith in Rep. U. S. Fish

Com. for 1872-3, p. 704, 1874.
Pisidium abyssorum STERKI, Nautilus, xi, p. 124, March, 1898.

Range. Deep water of the Great Lakes, and of the lake region
of northern Michigan and Minnesota.

Lake Michigan; Lake Superior to a depth of 159 fathoms (food
of Coregonus) ; Pine Lake, Mich. ; Green Lake, Wisconsin.

This is another of the extra-limital species which
search will probably reveal in Lake Winnipeg and other
northern lakes.

Corneocyclas ventricosa Prime.

Pisidium ventricosum PRIME, Proc. Boston Soc. Nat. Hist.,
iv, p. 68, 1851 ; Mon. Am. Corbie., p. 72, figs. 79, 80,

Range. Massachusetts, Canada, and northward to ventricosa.

Great Slave Lake.

Corneocyclas rotundata Prime.

Pisidium rotundatum PRIME, Proc. Boston Soc. Nat. Hist., iv, p.
164, 1851 ; Mon. Am. Corbie., p. 72, figs. 81, 82, 1865.

Range. Lake Superior region; Manitoba; St. Paul FIG 117.
Island, Bering Sea ! Corneocy-

Corneocyclas steenbuchii Moller. cla ! ro ~


Cyclas steenbuchii MOLLER, Index Moll. Grbnl., p. 20, 1842.
Pisidium steenbuchii MORCH, Am. Journ. Conch., iv, p. 37, 1868 ; ibid.,
Rink's Greenland, App., p. 440, 1877.

Range. Greenland, on the west coast! Iceland! Ungava, Lab-

This species appears to be unfigured, but there are specimens in
the Jeffreys collection from Iceland as well as Greenland. It appears
to belong to the section Cyclocalyx.

Corneocyclas occidentalis Newcomb.

Pisidium occidentale NEWCOMB, Proc. Calif. Acad. Sci., n, p. 94, 1863.
PRIME, Mon. Am. Corbie., p. 73, 1865.

Range. California to British Columbia.

East slope of Sierra Nevada, in California, to"9,7oo feet. Nanaimo,
Vancouver Island, British Columbia; Spokane Falls, Wash.


This unfigured species has been regarded by Roper as only a muta-
tion of C. abdita Haldeman.

Corneocyclas ultramontana Prime.

Pisidium ultramontanum PRIME, Mon. Am. Corbie., p. 75,
fig. 85, 1865.

Range. Canoe Creek, California ; Seattle, Wash. ;
Nanaimo, Vancouver Island, and Fender Island ! British FIG. 118.
Columbia. Corneocyclas


Corneocyclas arctica Westerlund. Prime.

Pisidium arcticum WESTERLUND, Vega Exp. Vetens. lakt., iv, p. 217, 1885.
Range. Port Clarence, Alaska.

Corneocyclas nivalis Westerlund.
Pisidium nivale WESTERLUND, op. tit., p. 218, 1885.
Range. Port Clarence, Alaska.

Corneocyclas glacialis Westerlund.
Pisidium glaciale WESTERLUND, op. tit., p. 218, 1885.
Range. Port Clarence, Alaska.

* Corneocyclas sibirica Clessin.

Pisidium sibiricum CLESSIN, K. Svenska Vet. Ak. Forh., p. 70, fig. 23, 1877 ;
Mon. Pisidium, Conch. Cab., ed. n, pi. vn.figs. 15-17, 1877. WESTER-
LUND, Fauna Pal. Reg., vn, p. 23, 1890.

Range. Western Siberia, on the Yenisei River to 60 50' N. Lat.,
? Port Clarence, Alaska.

* Corneocyclas borealis Clessin.

Pisidium boreale CLESSIN, in Westerlund, Fauna Pal. Reg., vn, p. 32, 1890.

Range. Western Siberia at Lusino. PPort Clarence, Alaska.

The preceding five species are ascribed to Port Clarence on the
authority of the literature solely. I have not seen specimens of any
of them. I suspect that the C. sibirica and borealis reappear in the
form of new species, among the three nominal species preceding them.

Corneocyclas pulchella Jenyns.

Cyclas pulchella JENYNS, Trans. Phil. Soc. Cambridge, 1832, p. 306, pi. x,
figs., 1812; not of Deshayes, 1835, nor Gassies, 1849. SOWERBY, in
Richardson, Fauna Bor. Am., in, p. 316, 1836.

Range. Middle and Northern Europe to 69 N. Lat. Arctic
America ?

Methy Lake, Athabaska (Richardson).


* Corneocyclas randolphi Roper.

Pisidium randolphi ROPER, Nautilus, IX, p. 99, Dec., 1895.

Range, Seattle, Washington.

This species is finely striated, very much like C. abdita in general
form, but of a peculiar and unique greenish-yellow color. It may
very likely extend into British Columbia.

Corneocyclas (Tropidocyclas) henslowana Sheppard.

Tellina henslowana SHEPPARD, Trans. Linn. Soc., xiv, p. 150, 1825.
Cyclas appendiculata (LEACH MS.) TURTON, Man., ed. r, p. 15, pi. xv, fig.
6, 1831. SOWERBY, in Richardson, Fauna Bor. Am., in, p. 316, 1836.
Pisidium hensloivianum JENYNS, Mon. Cyclas, p. 20, pi. xxi, figs. 6, 7, 1832.

Range. Europe north of the Alps; Canada; British America.

Hamilton Bay, Lake Ontario ; Lake Superior to Lake Winnipeg

The record from Richardson was naturally thought to be a misiden-
tification, but the recent discover}' in Lake Ontario of undoubted speci-
mens of this species, leads to the belief that Sowerby, who certainly
should have known a common British species, may after all have been

In closing the list of Sphceriidce I may be allowed to observe that
so large a part of it is derived from the literature, and not from the
present examination of specimens, that I do not feel the confidence in
the validity of all the species, or the correctness of all the identifica-
tions that I might have felt under other circumstances. Until the very
numerous species which have been named among American Pisidia of
late years, shall have been adequately illustrated and some knowledge
gained of the range of variation in these minute forms, a healthy skep-
ticism in regard to our population of this genus will doubtless continue
to prevail among collectors of fresh water shells.

Baird, W.

1863 Descriptions of some New Species collected at Vancouver Island and in
British Columbia by J. K. Lord, Esq. Proc. Zool. Soc. London, 1863,
pp. 66-71.

Baker, F. C.

1904 New American Lymnseas, II. Nautilus, xvn, No. 6, Oct., 1904, pp.

Bell, Robert.

1859 On the Natural History of the Gulf of St. Lawrence and the distribu-
tion of the Mollusca of Eastern Canada. Canadian Naturalist, iv, No.
3, June, 1859, pp. 197-200; and No. 4, Aug., 1859, pp. 241-242.
Binney, W. G.

1861 Catalogue of Land and Freshwater Univalve Mollusks collected in British
America by Messrs. Ross, Kennicott and Drexler, and deposited in the
Smithsonian collection. Proc. Acad. Nat. Sciences, Philadelphia, for
1861, October, p. 330 (Extras p. 59).

1876 On the lingual dentition, jaw and genitalia of Carelia, Onchidella, and
other Pulmonata. Proc. Acad. Nat. Sciences, Philadelphia, for 1876,
pp. 183-192, pi. vi ; also : Notes on Am. Land Shells, in, pt. I, 1876.

1885 Manual of American Land Shells. Bulletin U. S. National Museum,

No. 28. Washington, 1885, pp. 18-27.
Boettger, Oscar.

1880 Schnecken der Hudson Bai. Nachrichtsbl. d. Deutschen Malak. Ges.,

xn, p. 32, 1880.
Carpenter, Philip P.

1857 Report on the present state of our knowledge with regard to the
Mollusca of the West Coast of North America. Extract from the Report
of the British Association for the Advancement of Science for 1856,
London, Taylor and Francis, 1857, 8, pp. 159-368, pis. vi-ix. Also
printed separately with four preliminary leaves, London, 1857; cf. pp.

1864 Supplementary Report on the present state of our knowledge with re-
gard to the Mollusca of the West Coast of North America. London,
Taylor and Francis, 1864. Extract from the Report of the British
Association for the Advancement of Science for 1863, 8, pp. 517-686;
cf. pp. 604-607. Also issued separately, and reprinted by the Smith-
sonian Institution, in Smithsonian Miscellaneous Collections, No. 252
Dec., 1872, 8, pp. 3-172.

Christy, Robert Miller.

1885 Notes on the Land and Fresh Water Mollusca of Manitoba. Journal of
Conchology (Leeds), iv, July, 1885, pp. 339-349.

Cockerell, T. D. A.

1887 Letter to the editor. Conchologist's Exchange, n, p. 68, Nov., 1887.



Cockerell, T. D. A., continued.

1891 The Slugs of British Columbia. The Nautilus, v, No. 3, July, 1891, pp.

Cooper, William.

1834 List of Shells collected by Mr. Schoolcraft in the Western and North-
western Territory. Schoolcraft's Narrative of an Exp. to Itaska Lake,
App.,pp. 153-156, 1834.

Dall, W. H.

1885 Contributions to the Natural History of the Commander Islands, No.

in. Report on the Mollusca of the Commander Islands, Bering Sea,

collected by Leonhard Stejneger in 1882 and 1883. Proc. U. S. Nat.

Museum for 1884, vii, pp. 340-349, 1885.
1885 New or specially interesting Shells of the Point Barrow Expedition.

Proc. U. S. Nat. Museum for 1884, vii, pp. 523-526, 1885.

1885 Report of the International Polar Expedition to Point Barrow, Alaska.
Washington, Government Printing Office, 1885, 4. Natural History,
part vi. Report on the Mollusks, pp. 177-184, with plate.

1886 Report on the Mollusks collected by L. M. Turner at Ungava Bay,
North Labrador, and from the adjacent Arctic seas. Proc. U. S. Nat.
Museum for 1886, ix, pp. 202-208.

1886 Contributions to the Natural History of the Commander Islands, No.
vi. Report on Bering Island Mollusca collected by Mr. Nicholas Greb-
nitzki. Proc. U. S. Nat. Museum for 1886, ix, pp. 209-219.

1899 The Mollusk-Fauna of the Pribiloff Islands. Extract from The Fur-
seals and Fur-seal Islands of the North Pacific Ocean. Washington,
Government Printing Office, 1899. 4, Part in, pp. 539-545, and map.

1905 On the relations of the Land and Freshwater Mollusk Fauna of Alaska
and Eastern Siberia. Popular Science Monthly, vol. LXVI.NO. 4, Feb.,
I 95 PP- Sfo-S 66 -

Dawson, George Mercer.

1875 Land and Fresh Water Mollusca, collected during the summers of 1873-
1874, in the vicinity of the Forty-ninth Parallel, Lake of the Woods to
the Rocky Mountains. British North American Boundary Commission,
Report on the Geology and Resources of the region in the vicinity of
Forty-ninth Parallel (etc), 1875, App. E., pp. 347-350.

(? Dawson, J. W.)

1857 Description of some of the Freshwater Gastropods inhabiting the lakes
and rivers of Canada. Canadian Naturalist, n, No. 3, 1857, pp. 195-215.

D'Urban, W. S. M.

1859-60 Observations on the Natural History of the valley of the Riviere
Rouge and surrounding townships in the Counties of Argenteuil and
Ottawa. Canadian Naturalist, iv, No. 4, Aug., 1859, pp. 252-256; v,
No. 2, Apr., 1860, pp. 81-99.

Dybowski, W.

1901 Studien ueber die Mollusken des Amur-gebietes. Nachrichtsbl. d.
Deutschen Malak. Ges., xxxin, pp. 129-144, Oct. 1901.


I 49

Dybowski, W., continued.

1903 Zur Kenntnis der Ostsibirischen Landschnecken. Nachrichtsbl. d.

Deutschen Malak. Ges., xxxv, pp. 7-10, Feb. 1903.
1903 Beitrag zur Kenntniss du Mollusken-Fauna Kamtschatka's. Annal.

Mus. Zool. Imp. Acad. Sci. St. Petersburg, vm, 1903, pp. 40-55, with

8 figures in the text.

Fabricius, Otho.

1780 Fauna Groenlandica. Lipsiae, J. G. Rothe, 1780, 8, pp. xvi, 452, i pi.
Fulton, Hugh.

1905 On New Species of Helicarion, Ariophanta, Eulota (etc). Ann. Mag.

Nat. Hist., ser. vn, vol. xv, Jan., 1905, pp. 91-93.
Gebler, Friedrich August von.

1829 Sur le Muse*e de Barnaoul en Siberie. Bull. Soc. Nat. de Moscow, i,

PP- 51-59. i73-i88, 1829.
Gerstfeldt, G.

1859 Ueber Land- und Siisswasser-Mollusken Siberiens und des Amur-ge-
bietes. Me"moires des savants Strangers, ix, pp. 507-548, pi. ix, June,
1859. Imp. Acad. Sci. St. Petersburg.

Graeser, Louis, see Mousson, Albert.
Hanham, A. W.

1899 A list of the Land and Fresh Water Shells of Manitoba. The Nautilus,

xin, No. i, May, 1899, pp. 1-6.
Heron, Gilbert Clifford.

1880 On the Land and Fresh-water Shells of the Ottawa. Transactions of

the Ottawa Field Naturalist's Club, i, 1880, pp. 36-40, pi. n, figs. 3-8.
Krause, Aurel.

1883 Einige Landschnecken von der Tschuktschenhalbinsel und aus den
Sudostlichen Alaska. Sitzungs-bericht der Ges. Naturf. Freunde zu
Berlin, 1883, No. 3, pp. 31-37.

Krynicki, Johann.

1837 Bull. Soc. des Nat. de Moscou, x, p. 57, 1837.
Latchford, F. R.

1882 Notes on the Ottawa Unionidae. Transactions of the Ottawa Field

Naturalist's Club, HI, 1882, pp. 48-57, and plate.
1886 Observations of the Terrestrial Mollusca of Ottawa and Vicinity.

Ottawa Field Naturalist's Club, n, No. 2, pp. 1-21, 1886.

1890 Report of the Conchological Branch. Ottawa Naturalist, 1890. Extra
copies pp. 1-7.

1895 Casselman Shells. Ottawa Naturalist, ix, No. 7, Oct., 1895, p. 156.

1896 Notes on Recent Canadian Mollusca. Ottawa Naturalist, x, No. I,
April, 1896, pp. 14-16.

Latchford, F. R , and Fletcher, J.

1894 Report of the Conchological Branch. Ottawa Field Naturalist's Club,

1893. Ottawa Naturalist, viu, No. 6, Sept., 1894, pp. 97-98.
Latchford, F. R., and Poirier, P.

1884 Report of the Conchological Branch (for 1883). Transactions of the
Ottawa Field Naturalist's Club, n, No. i, 1884, pp. 130-134.


Latchford, F. R., and Poirier, P., continued.

1884 Report of the Conchological Branch (for 1884). Transactions Ottawa

Field Naturalist's Club, n, No. 2, 1884, pp. 263-266.
1887 Report of the Conchological Branch (for 1885). Transactions Ottawa

Field Naturalist's Club, n, No. 3, 1887, pp. 350-351.
Lea, Isaac.

1861-62 Descriptions of two New Species of Anodonta from Arctic America.

Proc. Acad- Nat. Sciences, Philadelphia, xiu, p. 56. March, 1861 ; also

Journ. Acad. Nat. Sciences, Philadelphia, v, pp. 212-214, pis. xxxiit

xxxui, 1862.
1867-68 Descriptions of five New Species of Unionidae and one Paludina of

the United States. Proc. Acad. Nat. Sciences, Philadelphia, xix, p.

81, 1867 ; also Journ. Acad. Nat. Sciences, vi, p. 287, pi. ix, 1868.

Lehnert, E.

1884 Alaska Plants and Shells. Science Record (Boston, Mass.), n, No. 8,
pp. 171-172, June 16,1884.

Lord, John Keast.

1866 The Naturalist in Vancouver Island and British Columbia. London,
Richard Bentley, 1866, 2 v., 8. Cf. Volume n, Appendix, pp. 356-370,

Maack, R.

1853 Notizen ueber einiger Land- und Stissw.-Mollusken, etc., mit Zusatz

von Dr. A. Th. von Middendorff. Bull. Phys. Math. Akad. Imp. des

Sci., St. Petersburg, xi, p. 372, 1853 ; Melanges Biol., n, pp. 8-18, and

19-22, 1853.
Martens, Carl Eduard von.

1855 Ueber der Verbreitung der Europaeischen Land- und Siisswasser-Gaster-

opoden. Inaugural dissertation, Tubingen, 1855, pp. 144, 8.
1872 Conchylien aus Alaschka. Malakozoologische Blatter, xix, pp. 78-80.

1882 [Shells of the Krause Expedition.] Sitzungsbericht der Ges. Naturf

Freunde zu Berlin, 1882, No. 9, pp. 138-143.

1885 Binnen Mollusken aus Mittel- und Ost-Asien. Conchol. Mittheil., n,
heft v, pp. 179-185, 1885.

Mayer, Charles.

1869 [Mollusca of the Plant beds] Heer, Flora fossilis Alaskana ; Kong.
Svensk. Vetensk.-Akad. Handl., n. ser. , vm, pp. 40-41, pi. x, figs. 7-13,

Middendorff, A. Th. von.

1851 Sibirische Reise. Susswasser und Land Mollusken, n, Th. i, pp. 273-

308, 389-433, 1851.
1851 Beschreibung einen neuen Molluskenarten, nebst einem Blicke auf den

geographischen Charakter den Land- und Susswasser-Mollusken Nord

Asiens. Bull. Phys. Math. Akad. Imp. des Sci. St. Petersburg, ix, pp.

108-112, 1851. Melanges Biol., i, pp. 160-164, 1851. See also Maack, R.

Moller, H. P. C.

1842 Index Molluscorum Groenlandiae. Hafniae, C. A. Reitzel, 1842, 8,
pp. 26.


Morch, 0. A. L.

1868 On the Land and Fresh Water Mollusca of Greenland. Amer. Jour.
Conch., iv, pp. 25-40, pis. in, iv, 1868.

1857 Prodromus Fauna Molluscorum Gronlandiae. Rink's Greenland, App.,
pp. 75-100, 1857. A second edition, revised and augmented, in the
Arctic Manual, London, 1875, pp. 124-135.

1877 The Greenland Fauna, iv, Mollusca. Rink's Danish Greenland, Lon-
don, 1877, Appendix, pp. 435-442.

Morelet, Arthur.

1858 Coquilles Terrestres du Kamtchatka. Journal de Conchyliologie, vn
Juillet, 1858, pp. 7-9.

Mousson, Albert.

1887 Coquilles Terrestres et Fluviatiles recueillies par M. Louis Graeser dans
le bassin de 1' Amour (etc.). Journal de Conchyl. , xxxv, pp. 10-32, Jan.,

NOTE. This paper was only discovered after the completion of the
present memoir. Nearly all the species mentioned in it are from the
upper waters of the Amur River, or from Vladivostok. Succinea insu-
laris Mousson, from an island at the mouth of the Amur, is the only
addition to the species properly belonging to the Primorski province,
treated of in my discussion of the species of the Northeast coast of
Siberia, but several are added to the list of Mongolian elements of the
fauna of the Amur drainage.

Nylander, Olof 0.

1899 A list of Shells from Northeastern Maine. The Nautilus, xni, No. 8,

Dec., 1899, pp. 102-106.

1901 Distribution of Limncea emarginata Say, and the variety Mighclsii
Binney, in Fish River, Aroostook Co., Maine. 8, pp. 1-4, pi. i-iv,
Caribou, Maine, the author, 1901.

Pilsbry, H. A.

1888 Lyogyrus, Gill, and other American Shells. Conchologist's Exchange,
ii, p. 113, 1888.

1898 Descriptions of new species and varieties of American Zonitidae and
Endodontidae. The Nautilus, xn, No. 8, Dec., 1898, pp. 85-87.

1899 New and little known species of Pristiloma. Proc. Acad. Nat. Sciences,
Philadelphia, for 1899, pp. 185-187, pi. ix.

1899 Remarks on the American species of Conulus. The Nautilus, xn, No.

10, Feb., 1899, pp. 113-117.
1899 Notes on a few Northwest American Land Snails. Proc. Acad. Nat.

Sciences, Philadelphia, for 1899, pp. 314-315.

Poirier, Pascal.

1883 Report of the Conchological Branch (for 1882). Transactions Ot-
tawa Field Naturalist's Club, i, No. 4, 1883, p. 74.
Posselt, Henrik J.

1898 Conspectus Fauna Gronlandicas. Meddelelser om GrSnland, xxm, pp.
xx, 298, 2 pi. and i map. 8. Kjobenhavn, Bianco Luno, 1898; cf. pp.


Provancher, Leon.

1890 Les Mollusques de la Province de Quebec. Le Naturaliste Canadien,
xxni, No. 9, Mar., 1890, pp. 184-187, and No. 10, April, pp. 203-205.

Racket!, Thomas.

1822 Descriptions of some Shells found in Canada. Transactions Linnean

Soc., xni, pp. 42-43, 1822.
Randolph, P. B.

1899 Collecting Shells in the Klondike country. The Nautilus, xn, No. 10,

Feb., 1899, pp. 109-112.
Reinhart, J.

1883 Die von den Herren Gebriider Krause auf ihrer Reise gesammelten
Pupa-, Hyalina-, und Valloni'a-arten. Sitzungsbericht der Ges. Naturf.
Freunde zu Berlin, 1883, No. 3, pp. 37-43.
Schrenck, Leopold von.

1867 Reisen und Forschungen im Amurlande in den jahren 1854-1856. n,
(3) : Mollusken des Amurlandes und des Nordjapanisches Meeres. St.
Petersburg, K. Akad. der Wissenchaften, 1867, 4, pp. 259-976.
Sheppard, Mrs., of Woodfield

1829 On the Recent Shells which characterize Quebec and its environs.
Trans. Literary and Scientific Society of Quebec for 1829, i, pp. 188-198.
Shimek, B.

1893 List of the Shells collected on the Lower Saskatchewan in 1892 by C. C.
Nutting. Bulletin University of Iowa, Nat Hist., n, 1893, pp. 291-292.
Cf. also Ottawa Naturalist, x, p. 15, 1896.
Siemaschko, Julian Marc von.

1849 Bemerkungen ueber einige Land- und Susswasser-Mollusken Russ-
lands. Bull. Phys. Math. Akad. Imp. des Sci. de St. Pe"tersbourg, vii,
1848, pp. 225-240, 1849.
Small, H. B., and Symes P. B.

1882 Report of the Conchological Branch (for 1881). Transactions Ottawa

Field Naturalist's Club, i, No. 3, 1882, pp. 57-59.
Sowerby, James de Carle.

1836 Mollusca. Richardson, Fauna Boreali-Americana, in, p. 315, London,

Taylor, George W.

1889 The Land Shells of Vancouver Island. Ottawa Naturalist, in, No. 3,
pp. 84-94, 1889.

1891 Land Shells of Vancouver Island. The Nautilus, v, No. 8, Dec., 1891,
pp. 91-92.

1893 Land and Freshwater Shells in the Rocky Mountains. The Nautilus,

vn, No. 8, Dec., 1893, p. 85.
1895 The Land and Freshwater Shells of Alberta. Ottawa Naturalist, ix, No.

9, Dec., 1895, pp. 173-178.
1897 Planorbis nautileus in America. The Nautilus, x, No. 12, pp. 139-140,

April, 1897.
Taylor, John W.

1885 Description of a New Species of Planorbis from Manitoba. Journal of

Conchology, iv (Leeds), 1885, p. 351.


Tryon, George W.

1865 Descriptions of New Species of North American Limnaeidae. Amer.
Journ. Conch., i, p. 231, 1865.

Vanatta, E. G.

1896 The Geographic Distribution of Planorbis umbilicatellus. The Nautilus,
ix, No. 10, Feb., 1896, p. 117.

Westerlund, Carl Agardh.

1883 Von der Vega Exp. in Asien gesammelten Binnen Mollusken. Nach-

richtsbl. d. Deutschen Malak. Ges.,xv, pp. 48-59, April, 1883.
1885 Land och Sotvatter Mollusker, insamlade under Vega-expeditionen.

Vega Exped. Vetenskapliga lakttagelser, iv, pp. 141-220, 1885.
Whiteaves, J. F.

1863 On the Land and Freshwater Mollusca of Lower Canada. Canadian
Naturalist, Feb., 1863, pp. 50-65. April, pp. 98-107. Extra copies pp.
1-31, 1863.

1880 List of Freshwater Mollusca from Manitoba and the valley of the Nelson
River. Geological Survey of Canada, Report of Progress for 1878-79,
Montreal, 1880. Report of Explorations of the Churchill and Nelson
Rivers, by Robert Bell. Appendix, in, pp. 61-62, c.

1881 Mollusca. Geological Survey of Canada. Report of Progress for 1879-
80, Montreal, iSSi. Report on Hudson's Bay, by Robert Bell. Ap-
pendix, iv, pp. 75-76, c.

1887 On some Marine Invertebrata dredged, or otherwise collected, by Dr.
G. M. Dawson, in 1885, on the coast of British Columbia, with a sup-
plementary list of a few Land and FreshWater Shells (etc.) from the same
region. Transactions Royal Society of Canada for 1886, iv, section iv,
1887, pp. 111-137, with 4 text-figures.

1895 Notes on Recent Canadian Unionidae. Canadian Record of Science,
VI, No. 5, Jan., 1895, pp. 250-263.

1895 Additional notes on Recent Canadian Unionidae. Canadian Record of
Science, vi, No. 5, Jan., 1895, pp. 365-366.

1895 Recent Mollusca from the headwaters of the Ottawa. Ottawa Natural-
ist, ix, April, 1895, p. 22.

1901 Notes on some Land and Freshwater Mollusca from Fort Chimo, Ungava
Bay, Ungava. Ottawa Naturalist, xiv, No. 12, Mar., 1901, pp. 221-223.

1902 Notes on some Fresh Water and Land Shells from Keewatin, Northern
Ontario and British Columbia. Ottawa Naturalist, xvi, 1902, pp. 91-92.

1905 Notes on some Freshwater Shells from the Yukon Territory. Nauti-
lus, xix, No. i, pp. 1-3, May, 1905.

1905 Lists of a few species of Land and Freshwater Shells from the immedi-
ate vicinity of James Bay, Hudson Bay. Nautilus, xix, No. i, p. 4,
May, 1905.


(The figures are natural size.)

FIG. I. Lymncea preblei Dall. The reflected margin of the aperture below
the umbilicus is somewhat broken. See p. 70.

2. A younger specimen of the same species from behind.

3. Lymncea randolphi F. C. Baker; p. 71.

4. The same species, another specimen, from behind ; p. 71.






(The specimens are figured natural size except when otherwise stated.)

FIGS. 1,2. Valvata Aelicoi'deaDall, magnified four diameters. The umbilicus
is partly hidden by a calcareous deposit ; p. 123.

3. Lymncea petersi Dall ; p. 66.

4, 5- Lymncea anticostiana Dall; p. 79.

6. Lymncea ? perpolita Dall ; p. 78.

7. 9. Lymncea atkaensis Dall ; p. 66.

8. Lymncea ? perpolita Dall, magnified two diameters ; p. 78.
10, ii. Planorbula christyi Dall, magnified two diameters; p. 99.

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