Petit — Journal de Conchyliologie. 241 



valvi ?) vix inequilaterali, postic5 subrostratd ; margine ventrali 

 excurvata : fulva, intus roseo tincta : concentric^ supra striata, 

 infra fortiter sulcata: apicibus parvis, haud involutis: umbo- 

 nibus perconvexis, posticti biangulatis: dentibus mediocribus. 

 Long. 7"'.9 ; alt. 5'".6 ; lat. 5"'.l. 



Shell ovate-triangular, thick, (inequivalve ?) subinequilateral, 

 subrostrated posteriorly; ventral margin excurved: yellowish 

 brown, tinged with red within : striated above, and strongly 

 furrowed below, concentrically : beaks small, not involute : 

 umbones very convex, posteriorly biangulated: teeth mode- 

 rately developed. It differs from C. Swiftiana in being less 

 rostrated ; it is also shorter than C. Kjoeriana ; and differs from 

 both in color, and in being very strongly sulcated. We have 

 therefore ventured to describe it from a single right valve. 



Length .31 inch ; height .22 inch ; breadth .21 inch. 



Station. — Unknown. 



Habitat. — The specimen (in Mus. Amh.) was said to have 

 come from the Amazon ; but the species is not a Potamomya. 



Journal de Conchyliologie, comprenant VHude des Ani- 

 maux, des Coquilles vtvantes et des Coquilles fossiles, publie sous la 

 direction de M. Petit de la Saussaye. — We desire to call the atten- 

 tion of Conchologists to this valuable journal. . The first volume, 

 published at Paris in 1850, contains 440 pages, with 15 plates, 

 and the second volume, published in 1851, has 444 pages, with 

 12 plates. Parts 1 and 2 of the third volume were issued in 

 April and June of the present year, and have together 240 

 pages, with 8 plates. The plates are beautifally executed, and 

 consist of figures of fossil and recent shells, the latter coloured, 

 with anatomical drawings of the soft parts of some species. 

 The articles in this Journal, contributed by D'Orbigny, Petit, 

 Eecluz, Moricand, Morelet, and other eminent scientific men, 

 are very interesting. The last number contains, among other 



