GEOGRAPHICAL DISTRIBUTION. 
Moll 19 
which iu other localities is frequented by these species, is the cause of 
the abnormal coloration. 
Abnormities or variations in the genital organs of Helix pomatia and 
fruticum j Semper, Reis. Philippin. Landmoll. v. p. 247. 
GEOaHAPHIOAL DISTRIBUTION. 
a. Land and Freshwater Mollusca. 
I. Arctic Region {Circumpolar). 
Note on the doubtful occurrence of Limax agrestis, and the more prob- 
able one of Avion fuscus, in Greenland and Siberia, by G. Rolleston, 
Zool. Anz. hi. pp. 400-405. 
Neighbourhood of Hudson’s Bay. Hyalinia Tiammonis (Strom.), Physa 
fontinalis (L.), var., and Limnvea palustris (Mull.) ; Kocelt, Nachr. mal. 
Ges. 1880, p. 32. 
2. Scandinavia and Russia. 
Prov. Medelpad^ in Sweden, 62*^ N. lat. 21 terrestrial and 7 freshwater 
species collected by 0. G. Anderson, determined by S. Clessin, Mal. Bl. 
(2) ii. pp. 151-154. 
Central Russia. 5 species of Unio, including two supposed new, by 
Clessin, Nachr. mal. Ges. 1880, pp. 79-81. 
Podolia. 10 terrestrial and 13 freshwater species from the alluvial 
deposits of the river Bug, enumerated by S. Clessin, Mal. Bl. (2) ii. 
pp. 200-203 ; they are all Central European ; a species of Hyalina and a 
variety of Buliminus tridens are described as new. 
3. British Fauna. 
R. Rimmer has published a treatise of 240 pp. on the land and fresh- 
water shells of the British Islands, with illustrations of all the species. 
Hertfordshire. Vertigo moulinsiana (Dupuy) ; Groves, Tr. Hertf. Soc. 
i. p. 81, pi. i. 
Yarmouth. Helix caperata, 3 varieties; Ashford, J. of Conch, iii. 
p. 73. 
Isle of Wight. Bulimus acutus var. hizona, and varieties of Helix vir- 
gata and caperata\ id. 1. c. p. 120. 
Ireland, King’s County. Helix ericetorum, varieties ; id. 1. c. p. 120. 
Living specimens of Bulimus detritus found at Scarborough, but prob- 
ably introduced with barley ; Mason, J. of Conch, iii. p. 118. 
4 . Central Europe. 
The European species of Succinea and Sphcerium are described and 
figured by Kobelt in his continuation of Rossmassler’s Iconographie, 
vii. pp. 66-78 & 83-90, pis. ccii.-cciv., ccvii. & ccviii. 
