CERITHIUM.— Plate IX. 



tricose, black, with varices and aperture white, spi- 

 rally striated, rough, longitudinally plaited, plaits 

 tuberculated, aperture large, canal rather short, outer 

 lip ridged. 



QuoY, Voy. Astro, t. 3. p. 130. pi. .5.5. f. 10. 



Hab. Africa. 



This darkly coloured, roughly tuberculated species is so 



short and ventricose, that it would hardly be taken for a 



Cerithium, although possessing all the essential characters 



of the genus. 



Species Gl. (Fig. o, i, Mus. Cuming.) 



Cerithium circin.\tum. Cerith. testa brevi, n'ujrd, sp'i- 

 raliter sulcis fiUfonuibiis albis ciiictd, inter siilcos 

 subnodosd, loiigitudinaUter plicald, plicis panels, mag- 

 nis, crassis, rotundis, aperturd rolnndd, canali brevis- 

 simo. 



The girdled Cerithium. Shell short, black, spirally 

 girt with filiform white grooves, between the grooves 

 rather nodose, longitudinally plicated, plaits few, 

 thick, large, rounded, aperture rounded, canal very 

 shoit. 



A. Adams, MS. 



Hab. Islaud of Mindanao, Philippines ; Cuming. 



The filifoi-m grooves, and the nodulous black bands be- 

 tween, give a brickwork appearance to the surface of this 

 interesting little shell. 



Species 62. (Mus. Cuming.) 



Cerithium obesum. Cerith. testa brevissimd,wntricosd, 

 grised, tiigrescente, aiifractibus panels, marglue albo- 

 fasciails, liueis inlerrnptls et pnnclis iilgris uotails, 

 aperturd intus nigro-fasciatd, columelld brevlssimd, 

 canali brevl, aperlo. 



The fat Cerithium. Shell very short, ventricose, grey, 

 tending to black, whorls few, banded with white at 

 the margin, marked with spots and interrupted lines, 

 aperture black-banded within, columella very short, 

 canal short, open. 



SowERBT, Thes. Conch. Cerithium sp. 79. 



Hab. Isle of Bohol, Philippines ; Cuming. 



Not very unlike C. dorsnosmi, but without tiie peculiar 

 dorsal protuberance of that shell. 



