MOLLUSCA. 521 
I 
Abnormally depressed and umbilicated specimens of Helix pomatia (L.) 
by Gervais, Journ. Conch, xvii, p. 181, pi. 6. figs. 1 and 2. 
Abnormall}’^ perforated and conical specimen of Achatina fuliea (Fdr.), the 
abnormity evidently caused by a fracture at an early age of the animal, by 
Martens in Decken’s Reisen in Ost-Afrika, vol. iii. p. 68, Mollusc, pi. 2. 
figs. 1 6, 1 c. 
Abnormity oi[^IIyalind] Helix nitidula (Drap.), Gredleb, Correspondenz- 
blatt d. zool. -mineral. Vereins in Regensburg, 1869, p. 36. 
Abnormal specimens of Planorhis corneus (L.), dwarfed, flat, distorted, 
and eroded, by Kobklt, Nachrichtsbl. mal. Gosollsch. i. p. 203. 
Sinistral specimen o{Marginella miliacea (L.) by Appelius, Bullett. malac. 
Ital. ii. p. 127, pi. 4. fig. 2. 
Contributions to Faunae. 
a. Land- and Freshwater Mollusca. 
1 . Central Europe, 
Germany. E. von Martens has arranged the literature healing on the local 
distribution of the German land- and fresli water mollusca, geographically 
and chronologically. Nachrichtsbl. mal. Gesellsch. i. pp. 66-78, 113-118, . 
129-132, 144-149, 160-166. The part published in 1869 treats only of the 
system of the Rhine, including the non-German parts. Some additions are 
made by Heynemann, ibid. pp,‘ 198-201. 
Norderney. Some land- and freshwater mollusks, found on the island 
Norderney, on the northern coast of Germany, are enumerated by Dr. O. 
Reinhardt and W. Kobelt, Nachrichtsbl. mal. Gesellsch. i. p. 217. 
Hamburgh^ Holstein, and Sleswig. Many species of land- and freshwater 
shells have been observed by E. Friedelat Blankenese, near Hamburg, Kiel, 
Entin, Plon, and on the island of Sylt. Among the more remarkable are Cyclas 
solida (Normand), found in the Elbe, and Acrnepolita (Hartm.). The author 
remarks that all specimens hitherto found in Northern Germany belong to 
this species, and not to lineata (Drap.). The presumed occurrence of Unio 
Uttoralis (Drap.) in Holstein is contradicted. Some particulars concerning 
Cyclostoma elegans, which has been found dead and also alive on the Danish 
island Seeland, are given. Mal. Bliitt. xvi. pp. 24-32, 66-72. 
Marh Brandenburg. The Recorder states that as early os 1767 Martini 
knew and distinguished the three species of Unio which are at present 
known to live in the province of Brandenburg, viz. Unio pictortim (L.), tumidus 
(Retz.), and crassus (Retz.). This is a reply to a remark made some years 
ago by Dr. Morch, Mal. Blatt. xvi. pp. 81-83. 
Bins. The mollusks of the environs of Ems, province of Nassau, are 
the subject of a treatise by G. Servain. They have been alread}-^ carefully 
collected by the German conchologists Thomre, Sandberger, and Koch in 
the ^.Tahrbiicher dcs Vereins fiir Naturkunde in Nassau,’ vol. iv. (1849), 
vii. and viii. (1861) ; and the new additions to their list (Nachrichtsbl. mal. 
Gesellsch. 1870, p. 119) consist of six species of rather doubtful character, 
most of them being established by Bourguignat. 
Wiirttemberg. On the occurrence of some species of land-snails hitherto not 
or but little known, E. v. Martens, Jahreshefte des Vereins f. Naturkunde in 
1869 . [vol. VI.] 2 o 
