152 



lamellar, and spreading over the umbilicus, which is middling 

 and with an obtuse angular margin. 



Cuba, D'Orbigny and Gould. 



172. C. TORTUosuM. (pi. xxviii. f. 185. 186.) Turbo 

 tortuosus, Chemn. xi. t. 195, A. f. 1882. 1883. 



T. oblonga, pupiforme, alba, tenui, lucida ; anfractibus ^, 

 rotundatis, obsoletissime striatis, ultimo compressiusculo, 

 prope aperturam subcoarctato, exserto ; sutura distincta ; 

 apertura circulari ; peritremate continue, reflexo, infra interne 

 canaliculato ; umbilico parvo, carinato, carina usque ad mar- 

 ginem peritrematis continua. 



Shell oblong, pupiform, white, thin, shining, with 7 rounded 

 volutions, which are obsoletely striated, the last of them 

 somewhat compressed, and slightly contracted near the aper- 

 ture, exserted ; suture distinct ; aperture circular ; peritreme 

 continuous, reflected, with a small canal internally at the 

 lower part ; umbilicus small, surrounded by a keel which 

 continues to the lower margin of the peritreme. From the 

 Nicobar Isles, Chemn. 



173. C. ALTUM. (pi. xxviii. f. 187.) nob. 



T. acuminato-turrita, crassiuscula, fusca, leevi, tenuissime 

 striata, apice obtusiusculo ; anfractibus 7 — 8, subrotundatis, 

 sutura distincta, tenui ; apertura circulari, labio suljincrassato, 

 reflexo patente, duplici, mergine externo magis expanse, intus 

 canali parva ad basin columellarem munito ; uml)ilico mediocri 

 extus carina obtusa marginato ; operculo corneo, tenui, mul- 

 tispirali. 



Shell rather acuminated, turreted, thickish, dark brown, 

 smooth, very finely striated ; apex rather obtuse ; volutions 7 

 or 8, somewhat rounded, with a distinct slender suture; 

 aperture nearly circular, the lip rather thickened, reflected, 

 double, the outer margin more spread than the inner, 

 furnished with a small canal within at the base of the colu- 

 mella; umbilicus moderate, bordered externally by a small 

 obtuse keel ; operculum horny, thin, multispiral. On trunks 

 of trees, in the mountains of the Isle of Negros. H. Cuming. 



174. C. PUPINIFORME (pi. xxviii. f. 188.) nob. 



T. subcylindrico-turrita, crassiuscula, obscura, fusca, laevi, 

 tenuissime striata, apice subaljrupte acuminato ; anfractibus 

 (), subrotundatis, sutura valida; apertura circulari, peritre- 

 mate discontinue ; labio externo subincrassato, revoluto, 

 flavido, ad basin columellarem canali angustissima spirali 

 interrupto; deinde superne latiori, demum supra ultimum 



