GEOGRAPHICAL DISTRIBUTION. 
Moll 19 
silia nigricans (Jeffr.), not before found so far north, with a table of the 
known land and fresh-water shells of Trondhjem-stift, Norland and 
Finmarken ; there is a remarkable difference between the land shells of 
the Norwegian coast and those of Lapland in these latitudes, the former 
being an advanced post of the central European fauna, the latter rather 
Arctic. E. V. Martens, SB. nat. Fr. 1881, pp. 34-39. 
Moscow. 54 terrestrial and 55 fresh-water species enumerated by C. 
Milachevich (title supra) \ 11 of them belong to alpine, 17 to the 
boreal province of Europe, and the rest are more generally distributed ; 
all species of Helix of large size are wanting, not only H. pomatia, but 
also nemoralis, liortensis, and arbustoriini. The author thinks that the 
isotherm of 4® R. forms the southern limit of the boreal zoological pro- 
vince in Russia. Bull. Mosc. Ivi. pp. 215-241. 
Russia. H. Drouet (Uuionid. Russ. pp. 31-35) enumerates 33 Rus- 
sian species of Unionidoe ; 16 of them live also in central and western 
Europe, 7 are proper to Southern Russia north of the Caucasus, 9 to 
Transcaucasia, and 1 is common to the Crimea and Transcaucasia. The 
peculiar species begin to make their appearance in the inferior parts of 
the Dnieper, Bug, and Dniester, at about 50° N. lat. ; several species and 
varieties found in the Dnieper are characterized by their elevated sickle- 
shaped hinder extremity ; the Trancaucasian species are generally distinct 
from, but similar to the European. 
3 . British Fauna. 
A new British variety of Clausilia duhia from Northumberland 
described by Westerlund, Q3fv. Ak. Forh. 1881, p. 58. 
Buccinea pfeifferi (Rossm.) and Hyalina draparnaldi (Beck), said to be 
new for England, by Fitzgerald, J. of Conch, iii. pp. 149 & 177, both 
from Folkestone [probably confounded heretofore with S. putris and II. 
cellaria^ Rec.] 
List of 5 species and 16 varieties of Succinca collected by Mrs. Fitz- 
gerald in various parts of the United Kingdom ; Hazay, JB. mal. Ges. 
viii. pp. 160-165. 
Scotland. Cyclostoma elegams in the lake district, Sciiarpe, J. of 
Conch, iii. p. 178. Vertigo pusilla in Scotland, Rimmer, Scot. Nat. vi. 
p. 61. 
Isle of Man. 12 terrestrial and 4 fresh-water species by Nelson, J. of 
Conch, iii. pp. 145 & 146. See also T. Talbot, Zool. (2) v. pp. 378-382. 
Yorkshire. Land and fresh-water shells enumerated by R. M. Christ, 
Zool. V. pp. 175-185 & 242-249. 11 terrestrial and 6 fresh-water species 
mentioned by W. C. Hey, J. of Conch, iii. p. 178. 17 terrestrial and 10 
fresh-water species from Burlington, Bempton, Spreton, and Flam- 
borough Head, by J. S. Gibbons, tom. cit. p. 238. 
Hornsea, near Hull. List of 22 terrestrial and 14 fresh- water species 
by J. D. Butterell, J. of Conch, iii. pp. 136 & 137. 
Nottinghamshire. Some rarer land shells mentioned by R. A. P. Rolfe, 
Sci. Goss. 1879, p. 22, J. of Conch, iii. p. 185. 
1881 . [vOL. XVIII.] 
B 10 
