866 



anfractibus vix tuberculatis, prope suturam tumidis; apertura. 

 magna, postice. contracta ; labio interno plica una magna. 



A thick, rather smooth, ventricose, obscurely clouded species, 

 with the upper part of the aperture contracted, and a large fold at 

 the back of the inner lip. Gallapagos Island, R. Cuming. 



71. Cerithium nebulosum (pi. clxxix. f. 60), Nobis. C. 

 maculosum, Kiener. 



Cerith. testa C. adusto simili, sed tuberculis magnis acutis ar- 

 mata. 



In form like C. adustam, but having large acute tubercles on 

 the angle of the whorls, and two rows on the middle of the last 

 whorl. Hab. Gallapagos Island, //. Cuming. The name C. macu- 

 losum is occupied by a species belonging to the Vertagus group. 



72. Cerithium ceruleum (pi. clxxix. f. 61, 62), Nobis. 

 C. tuberculatum, Lamk. ; Kiener, non Linn. 



Cerith. testa crassa,ventricosa, grisea, nigro maculata, tuberculis 

 magnis rotundatis ; anfractibus angulatis, ultimo magno ; labio ex- 

 terno crasso. 



This very thick, roughly tuberculated, bluish species is spotted 

 with black. It is from the Red Sea, and quite distinct from C. 

 tuberculatum of Linnaeus. 



73. Cerithium Guinaicum (pi. clxxxi. f. 126, 127), Phil. 

 Abbilcl. t. 1. f. 13. 



Cerith. testa ventricosa, minute striata, alba, epidermide fusca 

 viridescente partim induta ; anfractibus ad suturam tumidis, plicis 

 magnis undulatis, interstitiis fusco lineatis. 



Nearly all the colour is contained in the epidermis, which 

 clothes the lower part of the whorls, leaving the upper part white, 

 with very few brown spots or lines. The whorls are tumid near 

 the sutures, and undulated with large tubercles. Hab. Coast of 

 Guinea, L'ArgilUere ; Lord Hood's Island, H. Cuming. 



74. Cerithium litteratum (pi. clxxxi. f. 128, 129), Born, 

 Ind. Mus. Cses. p. 323. t. 11. f. 14, 15. 



Cerith. testa ventricosa, conica, granoso-striata, alba, griseo vel 

 rubro punctis quadratis tessellata; anfractibus prope umbones 

 angulata et tuberculis armata, ultimo magno; apertura magna, 

 subpyriformi, postice angulata, antice rotundata ; labio interno uni- 

 plicato, labio externo subexpanso ; canali brevi. 



The well-known West Indian shell, tessellated with square 



