131 



ornamented with a chestnut spiral band ; aperture nearly 

 circular, with a thickened, reflected peritreme ; sinuated 

 posteriorly ; umbilicus very small and linear, or closed. 



Madegascar, communicated by Mr. Powis. 



113. C. ictericum. (pi. xxxi. f. 268. 269.) nob. 



T. globoso-conica, crassiuscula, fulvescente, spira acumi- 

 nata, apice decollato ; anfractibus 4, rotundatis, spiraliter 

 sulcatis ; apertura circulari, peritremate incrassato, reflexo, 

 supra umbilicum parvum crasso, extenso, umbilicum fere 

 tegente, postice subacuminato ; sulcis spiralibus umbilici 

 majoribus. 



Shell globosely conical, thickish, fulvous, with an acumi- 

 nated spire, apex decollated ; volutions 4, rounded, spirally 

 grooved ; aperture circular, peritreme thickened, reflected, 

 thick and spread over the small umbilicus so as to cover it, 

 and somewhat acuminated posteriorly ; spiral grooA T es of the 

 umbilicus larger than the others. 



114. C. megacheilus. (pi. xxxi. f. 276.) nob. 



T. globoso-conica, crassiuscula, brunnescente, fascia ante 

 mediam castanea ;spirabreviuscula ; anfractibus 4£, rotundatis, 

 postice lineis levatis spiralibus, albo-castaneoque articulatis, 

 ultimo antice lsevi ; apertura circulari, peritremate erasso, 

 reflexo, rotundato, albicante ; umbilico mediocri. 



Shell globosely conical, thickish, brownish, with a chestnut 

 band in front of the periphery; spire rather short, with 4£ 

 rounded volutions, posteriorly with raised white spiral lines 

 with chestnut spots, the last smooth in front; aperture 

 circular, peritreme thick, reflected, rounded, broad, whitish ; 

 umbilicus of moderate size. 



115. C. Guimarasense. (pi. xxxi. f. 2/4. 275.) nob. 



T. globoso-conica, tenui, brunnea, pallescente maculata, 

 ad suturam articulata : spira acuminata, apice obtusiuscula ; 

 anfractibus 5, ventricosis, postice obsolete 2 vel 3 carinatis ; 

 apertura circulari, ampla, peritremate tenuiusculo, reflexo, 

 albo : umbilico mediocri. 



Shell globosely conical, thin, brown, varied with paler, and 

 with an articulated brown and whitish band at the suture ; 

 spire acuminated, with an obtuse apex ; volutions 5, ventri- 

 cose, posteriorly with 2 or 3 obsolete keels ; aperture circular, 

 large ; peritreme rather thin, reflected, white ; umbilicus 

 middling. From the Island of Guimaras, H. Cuming. 



116. C. Latilabrum. (pi. xxxi. f. 281.) D'Orb. 



T. globoso-conoidea, tenui, subhyalina, albida ; apice 

 decollato ; anfractibus 4, rotundatis, tenuissime transversim 



