518 M. de Ferussac on the Mtheria 



catalogue of Cypraea, a species arranged next to the latter, called 



C. annulata. 



Q. 



91. Cyprcea Childrfni. — Mr. Children's Cowry. 



Testa ovata, subcylindrica, palida costato ; striata-linea dorsali 

 sub itnpressa, indistincta ; basi plana ; extreraitatibus subrostratis 

 compressis, infra carinatis. 



Icon. Zool. Joarn. t. f. 



Mus. Brit. 



Shell ovate, somewhat cylindrical, white or yellowish, with an 

 irregular fulvous spot just over the spire, and another on the 

 hinder part of the back, covered with ribstriae, which meet in the 

 middle of the back in an obscure dorsal line ; base flat, the ex- 

 tremities rather produced and compressed, so as to have a keel on 

 each side of the base; aperture narrow, slightly dilated in front; 

 columella deep, plaited, and rather concave in front. Axis ^, 

 diameter -^ of an inch. 



I take the opportunity of dedicating this curious species to my 

 excellent friend J. G. Children, Esq. whose extensive acquire- 

 ments and zeal in science need not my feeble praise. 



[To be continued.'l 



Art. LXIII. Abstract of a Notice relating to the Mtherice 

 found in the Nile by M, Caillaud; by M, De Ferussac ;* 

 together with a Description of a new Species of jElheria. 

 By G. B. SowERBY, F. L. S. 



Naturalists have been informed by M. Caillaud, on his return 

 from Egypt, that he had collected Oysters in the upper parts of the 

 Nile ; this information was of a nature to excite the curiosity of 

 Geolgists and to interest them ; because, thereby, some formations, 

 reputed marine, on account of the presence of the Fossil Oysters 

 they contained, and attesting, by their alternation with deposits 

 formed under fresh water, the return of another sort of fluid, 



* Translated from the Memoircs tie la Sot-. d'Hist. Nat. dc Paris. 



