CERITHIUM.— Plate XVII. 



Species 121. (Mus. Cuming.) 



Cekithium pingue. Cerith. lestdventricosd,hrevi, fused, 

 spiraliter tenuiter striata; uiifractibus apicalibus quin- 

 que angustatis, angulatis, plicijeris, medianis quatuor 

 (jradatim crescentibus, inflatis, hifrd tuberculatis, ulti- 

 mo infra contraclo, supra tuberculato ; aperiurd sub- 

 quadratd, columelld brevi, subtoriuosd, canali brevis- 

 simd apertd, labro aiitice subproducto, lineis rubris 

 picld. 



The painted Cekithium. Shell ventricose, short, brown, 

 spirally finely striated ; five apical whorls narrow, 

 angular, plicated, four middle whorls gradually en- 

 larging, ventricose, tuberculated beneath ; last whorl 

 contracted beneath, tuberculated above; aperture 

 rather square, rather produced in front, painted with 

 reddish lines. 



A. Adams (Colina), Thes. Sowerby's Conch. Cerith., no. 

 123. f. 217. 



Hab. Cape Natal ; Cuming. 



Tliis may be considered as the type of the little group 



included by Mr. Adams in his genus " Colina''' character- 

 ized by a contraction in the last whorl. 



Species 122. (Fig. a, b, Mus. Cuming.) 

 Cerithium puPjEFORME. Cerith. testd angustatd, pu- 

 paformi, spiraliter sulcata, albidd, longitudinaliter 

 plicatd ; anfractilms numerosis, angulatis, medianis 

 ventricosis, ultimis contractis; aperturd oblongd, colu- 

 melld obliqud, truncatd, canali angusto, rectiusculo, 

 labro tenui, contraclo, infra subangulato. 

 Tue chrysalis-shaped Cerithium. Shell narrow, 

 chrysalis-shaped, spirally grooved, whitish, longitu- 

 dinally plicated ; whorls numerous, angulated, those 

 in the centre ventricose, the last contracted ; aperture 

 oblong, columella oblique, truncated, canal narrow, 

 rather straight, outer lip thin, contracted, slightly an- 

 gular beneath. 

 A. Adams, Sowerby's Thes. Conch. Cerith., no. 127. f- 221. 

 1 Hab. Philippines ; Cuming. 



