853 



catis, sulcis acute plicatis, ad suturam angulatim acute plici- 

 feris. 



The sculpture is much sharper than in C. obeliscus, and the 

 sulci as it were incised, and a row of sharp, regular plaits at the 

 suture quite distinguishes the species. 



17. Cerithium gemmatum (pi. clxxvii. f. 41), Hinds, Moll. 

 Voy. Sulph. pi. 11. f. 5, 6. 



Cerith. testa clavata, turrita, acuminata, nitida; anfractibus 

 planulatis, triseriatim granosis, serie superiore maxima ; lineis rufis 

 transversim ornatis, prope labrum divergentibus, infra suturam 

 albidis; apcrtura alba, superiie callosa; columella inferne pro- 

 ducta, plica parva ; canali oblique descendente. 



With the general form of C. obelisctis and the several similar 

 species, this species is remarkable for the width and llatuess of 

 the last whorl, and for the thickened and ascending lips of the 

 aperture. The whorls are beaded in three rows, the most pro- 

 minent being on the upper edge. The fold on the columella is 

 scarcely perceptible, and the slightly upturned canal is short. 

 Panama, three to seven fathoms, on a sandy floor. 



18. Oeeithium attenuatum (pi. clxxvii. f. 23, 24), PJd- 

 lippl, Abbild. t. i. f. 2. C. longicaudatum. Reeve et Adams, Zool. 

 Samarang, Moll. p. 43. pi. 10. f. 15 (1850). 



" Cerith. testa subulato-turrita, e rufo albida ; anfractibus pla- 

 niusculis, cingulis transversis parum elevatis subgranosis circa 

 novem sculptis, supremis costulatis; apertura late ovata; labro 

 crenulato, extus incrassato, intus sulcato; labio calloso, superius 

 plica transversa distincto ; cauda angusta, prselonga, obliqua." 



A very lengthened shell, with many whorls (nine in the above 

 description, fifteen in the accompanying figure, and seventeen in 

 our specimen here represented) ; on each whorl five beaded, al- 

 ternate with five plain, less elevated riblets. The canal is long 

 and very obliquely curved. Pasacao, Island of Luzon, PhiKp- 

 pines, K. Cuming. 



19. Cerithium Kochii (pi. clxxvi. f. 13, 14, 15), miijijii, 

 Abbild. pi. i. f. 3. 



Cerith. testa angusta, pallida, fusco vel rufo interlineata ; an- 

 fractibus spiraliter costellatis, costellis alteruatira granosis et pla- 

 nis; apertura subobliqua; labio externo paululum incrassato; 

 labio iaterno uniplicato ; canali breve adsccndente. 



In sculpture this species resembles C. atlcnuaturn, but the form 



