CERITHIUM.— Plate IV. 



Species 25. (Fig-, o, i, Mus. Ciiiiiini;.) 



Cerithium lttteratum. Ceritli. tesld brevimcutd, co- 

 nicu-veutricosd, granidoso-striatfi, alba. iiincuKs rnbris 

 vel nigris quadratis UnseUald, avfractibus panels, 

 prope suturam angitlatis, ad avyulum fiibei-cuUs acutis 

 armath, ultimo anfractu magna, apertuni magna, sub- 

 qaadratd, postlce in caiiah-ni contracto, cauafi aiitiro 

 brevimculo, labro cxpaiiso, antice produclo. 



The lettered Cekithium. S'nell rather short, roni- 

 callv vevitricosr, with granular stria", white, tessel- 

 lated with red or black square spots, whorls few. an- 

 gular near tiie suture, armed with sharp tubercles, 

 last whorl large, aperture large, ratlier square, pos- 

 teriorly contracted into a canal, anterior canal rnther 

 short, outer lip expanded, produced in front. 



Born, Ind. Mus. Csbs. p. 333. t. xi. f. 14, 15. 



Hah. West Indies. 



Species 3fi. (Mus. Cuming.) 



Cerithium Bornii. Cerith. testa breviusculd, veiitri- 

 cosd. nigra, avfractibus tuberculis magnis in seritbiis 

 duabus armatis, apertnrd parvd, colnmelld postice cal- 

 losd, antice brcvissimd, labro tenni. 



Born's Cerithium. Shell rathershort,ventricose, black, 

 whorls armed with large tubercles in two series, aper- 

 ture small, columella with a posterior callus, very 

 short in front, outer lip thin. 



.Soweuby, Thes. Conch. Cerithium sp. 88. 

 ('erilliinvi tuherculatnm. Born. 



llnb. Island of Seychelles. 



Each whorl has two rows of very large tubercles. 



