CEEITHIUM.— Pl.vik XII. 



spirally very finely striated, whorls rather veiitricose, 

 loiin-itudiiially plaited, spirally girt with three rows of 

 tubercles and one smaller intermediate row, tubercles 

 large, round, interstices narrow, aperlm-e oval, canal 

 short, onter lip fluted. 



SOWEKBY. 



Hal). Island of Bureas, Philippines ; Cuming. 



A very delicate thread-like line runs between the tuber- 

 cles on several of the cross-ribs. 



Species 83. (Fig. a, b, Mus. Cuming.) 



Ceritiiium nassoides. Cerith. testa brevi, parvfi, veii- 

 tricom, alba, ad sutitram inter pUcas et ad marijiuem 

 aperluree niacidis castaneis concinnis pictd, anfractibus 

 pauck, angulatis, superne plicalis, plicis lavigatia ad 

 aiignliim angiilatk, anfractu ultimo compresso, aper- 

 tiird parvd, caiiali breri, aperto, labro muculato, crasso, 

 ■vtbrotimdo. 



The xass.\-ltke Cerithiim. Shell short, small, ven- 

 Irieose, white, painted at the margin of the aperture 

 and at the suture between the plaits with neat chest- 

 nut markings, whorls few, angular, plaited at the 

 upper part, plaits smooth, angular at the angle of the 

 whorls, tlie last whorl compressed, aperture small, 

 canal short, open, outer lip spotted, thick. 



SowEiiBY, Thes. Couch. Cerithium sp. ll-i. 

 Hab. Sandwich Islands ; Dr. Newcombc. 



The pecidiarities of this pretty little shell are the neat 

 markings on each whorl, near the suture, and the depres- 

 sion of the last whorl. 



Species 84. (Fig. a, b, Mus. Cuming.) 



Ceritiiium pupa. Cerith. testa breei, ventricosd, pupa- 

 fornii, albd, prope suturam et infra medium fulvo fas- 

 ciatd, spiraUter striata, lomjitudinaliter pUcatd, plicis 

 distantibus, arcuatis, in seriebus tribus tuberculiferis, 

 tiiberciilis uciitis, anfractibus veutricosis, medianis iu- 

 Jlatis, ultimo puiilo cuntracto, apertnrd parvd, colu- 

 mella brevi, caual.i brevi, obliguo, aperto. 



The pupa Cekithium. Shell short, ventricose, chry- 

 salis-shaped, white, with tw'o fulvous bands, one at 

 the suture, the other below the middle, spirally 

 striated, longitudinally plaited, plaits distant, arched, 

 tuberculated in three series, tubercles sh.arp, wiiorls 

 ventricose, the middle ones inflated, the last a little 

 contracted, aperture small, columella short, canal 

 short, oblique, open. 



SoWEIiUY. 



Hab. Island of Capul, Philippines; Cuming'. 



