94 



nigro ; apertura circulari, peritremate subincrassato, simplici, 

 postice subacuminato ; umbilico magno, intus transversim 

 striato, extus rugoso. 



Shell suborbicular, rather depressed, whitish, covered with 

 a chestnut brown epidermis : spire short, obtuse, with 4 round- 

 ed, rugulose volutions, the last showing a slightly elevated 

 black band at the periphery ; aperture circular, peritreme 

 slightly thickened, not reflected, a little acuminated posteri- 

 orly ; umbilicus large, transversely striated, rugose ex- 

 ternally. From the mountains of New Granada, communi- 

 cated by Mr. Powis. 



10. C pusillum. (pi. xxiii. f. 5, 5*.) nob. 



T. orbiculari, subdiscoidea, apice spiree subprominulo ; an- 

 fractibus 4, rotundatis, lineis incrementi solum striatis ; sutura 

 profunda ; apertura circulari, peritremate tenuiusculo, subre- 

 flexo, postice, prope anfractum ultimum subemarginato ; um- 

 bilico patulo ; operculo multispirali, extus concavo, margine 

 canaliculato, intus nitido. 



Shell orbicular, nearly discoid ; apex of the spire rather 

 prominent, volutions 4, rounded, marked only with fine striae 

 of growth ; suture deep ; aperture circular, peritreme rather 

 thin, slightly reflected, and with a single very slight notch at 

 the posterior part next to the last volution ; umbilicus wide ; 

 operculum multispiral, concave externally, bordered with a 

 channel and shining inside. Found at the roots of shrubs and 

 trees at Calaumay, Isle of Lucon, and in the Isle of Negros, in 

 earth under decayed leaves ; by Mr. Cuming. 



11. C. BUFE8CENS. (pi. xxiv. f. 36, 37-) nob. 



T. suborbiculari, rufescente, spira brevi, anfractibus 4 ro- 

 tundatis, spiraliter costellatis et striatis, costellis crenulatis ; 

 sutura profunda; apertura circulari, pertremate tenui ; umbilico 

 magno. 



Shell nearly orbicular, generally of a reddish colour, with a 

 short spire consisting of 4 rounded, spirally ridged and striated 

 volutions ; the ridges crenulated ; suture deep ; aperture cir- 

 cular, with a thin sharp peritreme ; umbilicus large. From 

 Martinique, communicated by L. T. Powis Esq. 



12. C. plebeium (pi. xxv, f. 40.) nob. 



T. subglobosa, tenui, obscura, subfusca, spira breviuscula, 

 anfractibus 4, rotundatis, rapide crescentibus ; apice obtu- 

 siusculo ; sutura distincta ; apertura magna, circulari, peritre- 

 mate tenui ; umbilico parvulo ; operculo multispirali, extus 

 albicante, maculo centrali depresso, margine canaliculato, 

 intus nitido. 



