147 



Shell pyramidally cylindrical, decollated at the apex, of a 

 brownish black colour ; volutions five, ventricose, decussated, 

 with a distinctly marked suture ; aperture circular, with a con- 

 tinuous, reflected, spreading, yellow peritreme ; umbilicus 

 small. From Demerara, G. C. Bainbridge, Esq. 



157. C. obscubum. (pi. xxviii. f. 169.) Gray. M.S. 



T. ventricoso-subpyramidali, fusea, apice decollato ; anfrac- 

 tibus 4, ventricosis, decussatis, subasperis ; sutura crenulati- 

 uscula ; apertura circulari ; peritremate crasso, reflexo-sub- 

 patente, albicante ; umbilico minori ; operculo lamina spirali 

 reflexa. 



Shell rather ventricosely pyramidal, fuscous, decollated at 

 the apex, with four ventricose, decussated, rather rough, 

 volutions ; suture slightly crenulated ; aperture circular, with 

 a thickish, reflected, rather spreading, whitish peritreme ; 

 umbilicus small ; operculum with a reflected spiral plate. 



158. C. tessellatum. (pi. xxviii. f. 1 7^0 nob. 



T. oblonga, pyramidali, albicante, maculis quadratis 

 brunneis ornata ; spira acuminata, ad apice m obtusa, anfrac- 

 tibus 7? convexis, quinque ultimis lon^itudinaliter striatis ; 

 apertura subcirculari, superne subacuminata, peritremate 

 reflexo, tenui, albo, prope anfractum ultimum interrupto, 

 umbilico nullo. 



Shell oblong, pyramidal, whitish, with a few squarish brown 

 spots, principally next below the suture ; spire acuminated, 

 obtuse at the apex, consisting of seven convex volutions, the 

 five last of which are longitudinally striated ; aperture nearly 

 circular, rather acuminated at the upper part, with a thin 

 reflected, sharp edged, white peritreme which is not continuous 

 at that part where the lip comes in contact with the last 

 volution : there is no umbilicus. From Corfu, M. Partsch. 



159. C. patulum. (pi. xxviii. f. 170.) Draparnaud, pi. 

 1. f. 9, 10. Lam. Anim. vert. vi. 2. p. 149. 



T. turrito-conica, cinerascente-fusca, apice obtusiusculo ; 

 anfractibus 7? oblique striatis ; sutura distincta ; apertura 

 subelliptica, superne subacuminata; peritremate albicante, 

 extus reflexo-patente; umbilico minimo. 



Shell turrito-conical, greyish brown, sometimes speckled a 

 little with darker brown; apex somewhat obtuse ; volutions 

 seven, obliquely striated, with a distinct suture ; aperture 

 rather elliptical, slightly acuminated at the upper part ; 

 peritreme whitish, its outer edge reflected, spreading; umbilicus 

 very small. Found according to Lamarck, in the clefts of 

 rocks, near Montpelier, in the South of France. 



