104 



38. C. TENELLUM. (pi. xxiv. f. 50.) nob. 



T. subacuminato-pyramidali, spira aperturam superante, 

 apice obtuso ; anfractibus 4 — 5 ventricosis, spiraliter striatis, 

 interstitiis striaruni tenuissime decassatis ; sutura distincta, 

 rotandato-impressa ; apertura fere circular!, superne suban- 

 gulata, disjuncta; peritremate paululum patente; umbilico 

 parvo. 



Shell of an oblong rather acuminated pyramidal form, 

 obtuse and rounded, not truncated at the apex ; s ire rather 

 longer than the aperture ; volutions from 4P 5, ven- 

 tricose, spirally striated, the interstices of the striae very 

 finely decussated ; suture distinct, the volutions being as it 

 were excavated near to it give it the appearance of being 

 grooved out ; aperture nearly circular, rather angular at the 

 upper part, separated from the last volution ; peritreme very 

 slightly expanded; umbilicus small. A small fillet passes 

 from the upper edge of the aperture to the last volution. 



39. C. PYGM/EUM. (pi. XXX. f. 25i.)nob. 



T. subglobosa, tenuiuscula, fuscescente, spira acuminatius- 

 cula, apice obtuso ; anfractibus 4^, rotundatis, spiraliter sulca- 

 tis ; sutura distincta ; apertura subcirculari, postice paululum 

 acuminata ; peritremate tenui, prope umbilicum parvum 

 subreflexo. 



Shell subglobose, rather thin, fuscous, with a slightly acu- 

 minated, spire, obtuse at the apex, and consisting of 4 rounded 

 spirally grooved volutions ; suture distinct ; aj^erture nearly 

 circular, slightly acuminated posteriorly; peritreme thin, 

 slightly reflected near the small umbilicus. Brought from 

 New Ireland by R. B. Hinds, Esq., R. N. 



40. C. SicuLUM. (pi. xxiv. f. 51, 52.) nob. C. sulcatum, 

 Drap. and Philippi. 



T. subacuminato-pyramidali, spira aperturam superante, 

 apice obtuso, anfractibus 5, ventricosis, Isevigatis, spiraliter 

 obsoletiuscule striatis ; apertura fere circular!, superne 

 subangulata, disjuncta ; peritremate paululiim patente ; um- 

 bilico parvo ; operculo spiral!, anfractibus rapide majoribus, 

 oblique striatis. 



Shell of a somewhat acuminated pyramidal form, obtuse 

 and rounded, not truncated at the apex ; spire rather longer 

 than the aperture ; volutions five, ventricose, nearly smooth, 

 and obsoletely spirally striated ; aperture nearly circular, 

 rather angular at the upper part, and slightly separated from 

 the last volution ; peritreme spreading a very little ; um- 



