887 



Journ. de Conch., Nov. 15, 1851. Ccrithmm uuicarinatum, Met- 

 calfe, Ann. and Mag. of Nat. Hist. 



Ceritli. testa pyramidali, cornea, C. Sinensi simili, sed magis 

 conica ; anfractu ultimo uuivaricoso, inferne unicariuato ; apertura 

 subtrigona. 



If really distinct from C. Sijiense, it differs from that species in 

 being a more pyramidal shell, with the whorls more straight- 

 sided, and the aperture triangular. Borneo. Mr. Cuming's col- 

 lection. 



167. Cerithium ornatum (pi. clxxxvi. f. 277, 278), A. 

 Adams (Cerithidea) . 



Cerith. testa laevigata, tenui, plerumque fasciis fuscis et albis 

 picta; anfractibus ventricosis, plus minusve distanter costatis; 

 apertura expansa. 



This species is ornamented by bands of brown and white ; it is 

 rather horny, smooth, and also differs from C. decoUatum in haviug 

 the whorls ventricose. Philippines, Cuming. 



168. Cerithium corneum (pi. clxxxvi. f. 275), A. Adams 

 (Cerithidea) . 



Cerith. testa turrito -conica, apice truncata, tenui, cornea, fusca; 

 anfractibus planiusculis, varicibus nuUis, costis arcuatis longi- 

 tuchnalibus sequalibus sculptis, anfractu ultimo ad peripheriam 

 angulato, basi subplano sulcato ; apertura subquadrata, antice 

 subcanaliculato ; labro expanso, margine acuto reflexo. 



This species is more fluviatile than many of the others, and the 

 texture of the shell is thin and horny ; in general appearance it 

 most resembles C Charbonnieri of Petit, but the last whorl is not 

 acutely carinated. The ribs are more straight and the whorls less 

 ventricose than in C. ornatum. Borneo, mouths of rivers. 



169. Cerithium varicosum (pi. clxxxvi. f. 280, 281, 282), 

 8owerhy, Gen. of Sh. C. Hegewischii, Th., Sp. Gen. Coq. t. 1. 

 f. 6. Var. C. lostoma, Fffr. C. Helicoide, C. B. Admm. C. 

 validum, C. B. Adam.8, Sh. of Jamaica. 



Cerith. testa acute pyramidaK, solida, costis longitudinalibus et 

 spiralibus undulatis et nodiferis cancellata; fusca, in medio an- 

 fractuum albo fasciata ; plerumque varicosa, varicibus crassis ; an- 

 fractibus decem, ultimis subito crescentibus ; apertura albida, seu 

 fasciata, subquadrata ; columella tortua; canali vix excavate ; labio 

 externo utriuque incrassato, ad canalem angulato. 



5 z 



