141 



1.39. C. ALBUM, (pi. xxviii, f. 154.) nob. 



T. oblonga, alba, spira subconoidali, decollata; anfrac- 

 tibus 3 — 4, rotundatis, Isevibus ; sutura distincta ; apertura 

 elliptica ; peritreraate duplici, interno tenui, simplici, extemo 

 angusto, subreflexo, super ne angulato. 



Shell oblong, white, s^^ire rather conical, decollated ; volu- 

 tions from three to four, rounded, smooth; suture distinct; 

 aperture elliptical ; peritreme double, the internal one thin, 

 simple, the external one narrow, somewhat reflected, angular 

 at the upper part. 



140. C. Chemnitzii, (pi. xxviii. f. 155. 156.) Gray, in 

 Supp. to Wood's Ind. Testae, t. 6. f. 6. 



T. oblonga, subconoidali, apice decollato ; anfractibus 4 — 5, 

 rotundatis, Icevibus, fascia fusca spirali unica, vel fasciis 

 quatuor fuscis interruptis ; sutura distincta ; apertura sub- 

 rotunda, superne subacuminata ; peritremate duplici, interno 

 tenui, simplici, extemo latiusculo, subexpanso, superne sub- 

 acuminato, flexuoso ; umbilico minimo ; operculo testaceo 

 spirali, anfractibus paucis striatis. 



Shell oblong, somewhat conical, apex truncated, with from 

 four to five smooth rounded volutions, sometimes with a 

 single fuscous broad spiral band, or with four narrow spiral 

 interrupted fuscous bands ; suture distinct ; aperture nearly 

 round, rather acuminated at the upper part ; peritreme double, 

 internal slender, simple, external rather wide and spreading, 

 rather acuminated and flexuous at the upper extremity ; 

 umbilicus very small ; operculum shelly, spiral, consisting of 

 very few striated volutions. South Africa. 



141. C. INTERRUPTUM. (pi. xxviii. f. 152. 153.) Lam. 

 Anim. sans vert. vi. 2, p. 145. 



T. tenui, pellucida, ovat-o-conoidea, apice obtuso, fusco ; 

 anfractibus 4 — 5, ventricosi.s, Isevibus, albidis, fasciis luteis, 

 spiralibus, interruptis ; sutura profunda ; apertura circulari ; 

 peritremate interno tenui, levatiusculo, extemo reflexo, 

 dilatato-patente ; umbilico parvo. 



Shell thin, pellucid, ovately conoidal, with an obtuse dark 

 brown apex; volutions from 4 to 5, ventricose, smooth, whitish, 

 with spiral interrupted fulvous bands ; suture deep ; aperture 

 circular ; internal peritreme thin, rather elevated, external 

 reflected, dilated, spreading ; umbilicus small. The smallest 

 volutions are transversely striated. M. Chenu, in the 

 Receuil, &c. has given this for C. ambiguum, and vice versa 

 has represented Lamarck's C. ambiguum, under the name of 

 C. interruptum. 



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