ae 
ty VITRINA PELLUCIDA. 
- NEARCTIC DISTRIBUTION. 
Keewatin—In damp woods, Norway House (Bell, Geol. Surv. Canada, 1879). 
Ontario—Rideau River, Bryant Walker. Moose Factory and James Bay (Dall, 
Moll. of Alaska, 1905, p. 37). 
Quebec— Abundant under cliffs by River St. Lawrence at St. Joseph’s ; and fine 
specimens on banks of tributary of St. Lawrence River at St. Charles near St. 
Romauld’s ; also frequent, Bay of Barachois, Gaspé, May 1892 (A. W. Hanham, 
Naut., Oct. 1893, and Jan. 1897). Anticosti (Latchford, Amer. Nat., 1884, p. 1052). 
Manitoba—Reed River and Lake of the Woods. Among moss, beside a sleugh 
near Carberry (R. M. Christy, Journ. of Conch., April 1885, p. 345). 
Alberta—Red Deer and Laggan (Dall, op. cit., p. 37). 
New Brunswick—(Gould, Invert. Mass., 1870, p. 34). 
Massachusetts—Very thin and transparent specimens under old boards, at an 
old saw mill, Westport (J. H. Thomson, J. of Conch., iv., Oct. 1885, p. 370). 
Vermont—(Gould, |.c.). 
Pennsylvania—A colony at Leetsdale, Allegheny Co., Nov. 1905! G. H. Clapp. 
New York—Immensely abundant and fine by ditch-sides on the flats near 
Mohawk, Herkimer Co., Nov. 1864. Found also in a yard at Litchfield, in the 
same county, by Dr. Brown (Lewis, Pr. Acad. Nat. Sei. Philad., 1873, p. 107). 
Plattsburgh, locally abundant, G. H. Hudson. Cayuga Lake Valley (Banks, 
Nautilus, April 1892, p. 137); also at Pittsford, in Monroe Co., J. Walton; Troy, 
Utica, and Palmyra (Binney, Manual, 1885, p. 177). 
Maine—Caribou and Presque Isle; also in considerable numbers at Fort Kent 
(Nylander, Nautilus, Jan. 1900, p. 104). Bethel, Portland, and on several islands 
in and near Casco Bay, also on St. John’s River in the extreme north of the state 
(E. S. Morse, Pulm. Maine, 1864, p. 11). 
Michigan—Abundant on Lime Island, St. Mary’s River. Found also at Charle- 
voix and Traverse City (Bryant Walker, 1899). 
V. pellucida exilis Morelet, Journ. de Conch., 1858, p. 8. 
SHELL of a whitish or translucent glassy hue, of a smaller size and not so 
depressed as alaskana. 
The jaw according to Binney does 
not ditfer from that of its allies. 
The dentition is given by Binney : 
as 37+14+37 with 7 perfect laterals. (\ LY, A (Y Cs 
Found in North-eastern Asia and 
adjacent islands, embracing, accord- Fic. 21. Fic. 22. 
ing to Dall, the Commander and Fic. 21.—Median, admedian, and marginal teeth of 
Kurile Islands, the Aleutian and the V. exilis, highly magnified (after W. G. Binney). 
Behring Islands, the Tschukschis Fic. 22.—Shell of Vztvina extlis Morelet (after Dall). 
Peninsula, North-east Siberia, east of the Stanovoi Mountains, and north of Aian, 
also in Japan, and at Petropavlovsk in Kamtchatka. Dr. Dall is, however, now 
of opinion that exilis has not yet extended beyond the Commander Islands, and 
that the more eastern records are probably all referable to alaskana. 
Geographical Distribution.—Vitrina pellucida is a very ancient 
and widely dispersed species, extending entirely over Europe, while geo- 
graphical races or allied species exist in Siberia, North America, and in 
the Himalayan region. Dr. Dall records V. pellucida as ranging over 
Siberia from the Ural Mountains to the River Lena, and as also inhabit- 
ing the basin of the Amur, the Island of Saghalien, and the region 
between the Amur and the Stanovoi range of mountains. 
BRITISH ISLES. 
Vitrina pellucida is generally distributed throughout the British Isles, 
appearing to be most plentiful im the north; specimens have been verified 
from every county and vice-county into which these islands have been 
divided, except Wiltshire North in England; Aberdeen North, Ebudes South 
and Shetland Isles in Scotland; and Carlow and Mayo East in Ireland. 
GERMANY. 
Probably diffused throughout the country and has been recorded for Alsace, 
Baden, Bavaria, Brandenburg, Brunswick, Franconia, Galicia, Gotha, Hanover, 
Hesse, Hessen-Cassel, Lorraine, Lusatia, Mecklenburg, Nassau, Oldenburg, Pomer- 
ania, Prussia, Reuss, Rhenish Prussia, Saxony, Schleswig-Holstein, Silesia, 
Thuringia, Weimar, Westphalia, and Wurtemburg. 
