889 



173. Cerithium subcarinatum (pi. clxxxvi. f. £87), Nohis. 

 Cerith. testfi parva, la^vi, fusco-nigricante, longitudinalitcr cos- 



tata, subtus spiraliter bicarinata ; apertura bicaiialiculata ; labio 

 extenio paululum producto ; cauali brevissimo, profundo. 



A small, dark browu shell, which is smoothly ribbed at the 

 upper part and shows two obtuse keels at the lower part of the 

 whorls. New Zealand, T. Hart, R.N. 



174. Cerithium scalarifoeme (pi. clxxxvi. f. 290), Say ^ 



Cerith. testa pyramidali, acuta, fusco-nigricante, in medio aii- 

 fractuum albo-fasciata, longitudinalitcr distanter costata, subtus 

 uuicarinata; anfractibus duodecim, ventricosis; apertura subex- 

 pansa ; labio externo antice producto. 



A pretty little species, with distant ribs and distinct rounded 

 whorls. It has a keel at the lower part. Florida. 



175. Cerithium costatum (pi. clxxxvi. f. 291, 292), Wood, 

 (Strombus), 43. C. Lafoudii, Michaud, Kiener, Sp. Gen. Coq. 

 pi. 24. f. 3. C. ambiguum et servilis, C. B. Adams. 



Cerith. testa parva, acuta, fusca, spiraliter striata, longitudina- 

 litcr crebrisulcata; anfractibus numerosis, ventricosis, ultimo sub- 

 tus unicarinato ; apertura expansa. 



Resembling C. sealanforme, but smaller, with the ribs more 

 numerous and crossed by spiral striae. Jamaica. 



176. Cerithium Rissoideum (pi. clxxxvi. f. 289), Nohis. 

 Cerith. testa fusco-cserulescente, pyramidah ; anfractibus ro- 



tundatis, obhque albo-costatis, infra spiraliter carinatis ; labio ex- 

 terno, crasso, expanso, sinuato. 



Narrower than C. Montagnei, with less expanded aperture, and 

 the whorls prettily ornamented by regular bluish-white ribs. Mr. 

 Cuming's collection. Locality unknown. 



177. Cerithium plumbeum (pi. clxxxvi. f. 293), Nohis. 



Cerith. testa parva, elongata, plumbea, spiraliter striata, longi- 

 tudinalitcr vix costata ; anfractibus decern, subrotundatis, gradatmi 

 crescentibus ; apertura ovali. 



A pretty little Australian species, of wliich several specimens 

 are in Mr. Hanley's collection ; over a brown ground-colour there 

 is a pretty plum-like bloom. It is spirally striated. 



178. Cerithium pauxillum (pi. clxxxvi. f. 291), A. Adams. 



