120 
MOLLUSCA. 
species systematically, with full citations and indication of loca- 
lities. The occurrence in alluvial and diluvial deposits in Ger- 
many is also indicated. 48 genera and 347 species of land and 
freshwater Mollusca are enumerated. This book, worked out 
with great care and zeal, will prove very useful to every one 
who is interested in the geographical distribution and literature 
of the European extramarine Mollusca. [A few remarks by the 
Recorder will be found in the Nadir . mal. Ges. ii. pp. 99-102 
and 110-117.3 
E. VON Martens has continued his arrangement of the litera- 
ture bearing on the distribution of the German Mollusca (Zool. 
Rec. V. p. 521), treating of the middle and northern parts of 
Germany beyond the system of the Rliine. Nadir, inal. Ges. 
ii. pp. 3, 17, 33, 65, 121, 137, 153. 
E. V. Martens calls the attention of the German conchologists to the 
geographical distribution of certain land-shells. Cyclostoma elegans (Miill.) 
is found along the Rhine and in some parts of the system of the Weser, and 
even along the little river Unstrut j but is wanting to the east and south- 
east of this region, except in a little area on the slope of the Austrian Alps 
towards Hungary. This species is very often accompanied by Helix cartii- 
siana, Miill,, the distribution of which, however, is somewhat more re- 
stricted in the western and more extended in the south-eastern district. 
Helix bidens (Chemn.), on the other hand, is common throughout Germany 
eastward of a line going from Hamburg to Augsburg j westward of this line 
it is found in diluvial deposits only, and is wanting in the greater part of the 
Alps. It is suggested that agriculture acts in a directly opposite manner on 
these two species. Azeca mmUeana (0. Pfr.) occurs in Germany, with the 
latter, in the central parts of the systems of the Rhine and the Weser, but is 
quite absent in Southern Europe. Nadir, mal. Ges. ii. pp. 157-1 GO, 1G9-172, 
and SB. nat. Fr. 1870, pp. 57-69. 
Courland. 65 species of land and 62 of freshwater mollusca are enume- 
rated by F. H. Kawall, Ann. mal. Belg. iv. (18G9) pp. Ixviii-lxxv. 
Pomerania. Lehmann enumerates 115 species of land and freshwater 
mollusca living in this province 5 among the more remarkable are H. vindo- 
lonensis {austriaca)^ acclimatized by II. Dohrn, Helix lamellata^ bidens, incar- 
nata (but no personata or obvoluta !), lluUmus l^ idens, obscurus (no mon- 
lanus !), Clausilia ventricosa, plicatala, nigricans, plicuta, similis, cana, lami- 
nata, Planorbis acies, discoides, Amphipeplea glutinosa, &c. Mal. Bl. xvii. 
pp. ,94-98. 
Mark- Brandenburg. Cyclas solida (Normand) and Pupa frunmdum (Drnp.), 
found at Oderburg, are added by Dr. Reinhardt and the Recorder. Friedel, 
Zool. Gart. 1870, p. 387. 
Hamburg. The land and freshwater shells of the environs of Hamburg, 
lAibeck, Kiel, and some parts of Holstein and Slesivick are reviewed from 
new observations by E. Friedel. Hyalina excavata (Bean), hitherto only 
known as British, found near Gliickstad in Sleswick ; Cyclas jnsidioides 
(Gray) on the island of Fohr. ]\Ial. Bl. xvii. pp. 30-71. — Some additions 
concerning Hyalina subterranea (Bourg,), Limnceus glaber (Miill.), and L. 
silesiacus (Scholtz) are given in Nachr. mal. Ges. ii. pp. 97, 98. — C. Wessel 
