OP CONCHOLOGY. 3t7 



genus. Dr. Stimpson* has established for these species, the 

 genus Potamopyrgus. 



Pomatiopsis Nickliniana, Lea, and lapidaria, Say, are re- 

 ferred to Hydrohia. Bythinia seminalis, Hinds, is placed as a 

 synonym of Fluminicola (Paludina) Nuttalliana, Lea; and 

 nucha, Lea, is made a synonym of virens, Lea. 



This work is indispensable to those who study the genera 

 of which it treats, its completeness being such as to afford an 

 exhaustive catalogue of species and bibliographical refer- 

 ences. 



Fauna der Land und Susswasser Mollusken Siebenburgens : by 

 E. A. BiELZ. 8vo, pp. 206. Hermannstadt, 1868. 



This work contains detailed descriptions of the species 

 found in the neighborhood of Hermannstadt, with very full 

 remarks on localities, and on the varieties of the shells and 

 habits of the animals. One hundred and fifty-three species 

 and numerous varieties are described, preceded in each genus 

 by a critical synopsis. 



We have received from the author, along with the work 

 above cited, a very full suite of these shells, and can testify to 

 the very interesting local variation in the aspect of many of 

 the widely distributed European species ; many of the shells, 

 however, are of very restricted distribution, and a number of 

 them were first detected and described by Mr. Bielz; among 

 them, the following, for the first time: — 



Vitrina glohosa. Pisidium cuneatum. 



Eevision der Nacktschnecken Siebenburgens: bye. a. bielz. 

 (Verhandlungen und Mittheilungen des Siebenburgischen Veriens fur 

 Naturwissenchaften, 1863.) 



Die Besehadigungen an den Sehalen der Susswasser Muscheln 

 und ihre Ursachen: by e. a. bielz, (From the same.) 



XJeber das Vorkommen der Pupa truncatella, Pfr., und einiger 

 anderer seltener Mollusken im Kerzer Gebirge: by e. a. 

 BIELZ. (From the same.) 



Verzeichniss der Mollusken und Conehylien Sammlung von 

 E. Albert Bielz. 3d Edit., 38 pp., 8vo. Hermanstadt, 1865. 



This catalogue of about five thousand species and varieties, 

 is published for distribution to conchologists desiring to make 

 exchanges. The duplicates in the collection are indicated by 

 a star, and amount to about fifteen hundred species. 



* This Journal, Part 1, p. 53. 



