113 



tura subcirculari, peritremate subincrassato, subreflexo, pos- 

 tice acuminatiusculo ; umbilico maximo, spiraliter castaneo 

 lineato. 



Shell nearly orbicular, depressed, thickish, smooth, of a 

 chestnut colour mottled with whitish ; spire slightly elevated, 

 with a blackish apex, volutions 4, rounded, obsoletely 

 spirally striated ; aperture nearly circular, with a slightly 

 thickened and somewhat reflected peritreme, rather acumi- 

 nated posteriorly. Umbilicus very large, spirally coloured 

 with chestnut lines. In Mr. Cuming's collection. 

 66. C. mucron atum. ( pi. xxv. f. 91. ) nob. 



T. suborbiculari, depressa, pallescente fusca, tenui, spira 

 brevi, mucronata; anfractibus quatuor, rapide crescentibus, 

 rotundatis, tenerrime transversim striatis ; sutura valida ; 

 apertura circulari ; peritremate duplici, externo lato subre- 

 flexo ; interno angusto, lineari ; umbilico lato ; operculo 

 multispirali, sutura anfractuum lamellosa, margine eanali- 

 culato, intus nitido. 



Shell suborbicular, depressed, of a pale brown colour, 

 thin, with a very short mucronated spire, volutions 4, 

 rounded, increasing rapidly, very finely transversely striated ; 

 suture deep ; aperture circular, with a double peritreme, 

 external peritreme broad, reflected, internal narrow, linear ; 

 umbilicus broad, operculum multi-spiral, the suture of its 

 volutions lamellose ; its border channelled, and inside 

 smooth and shining. Found by Mr. Cuming, under decayed 

 leaves, at Calauang in Lucon. 



67« C. SUBSTRI ATUM. (pi. XXV. f. 95.) nob. 



T. suborbiculari, depressa, crassiuscula, keviuseula, fusces- 

 cente ; spira brevissima, submucronata ; anfractibus quatuor, 

 rotundatis, postice transversim striatis, striis ex sutura pro- 

 funda radiantibus, antice kevibus ; apertura circulari, peritre- 

 mate subincrassato, subreflexo : umbilico lato, operculo 

 multi-spirali, latere canaliculato, intus nitido. 



Shell nearly orbicular, depressed, thickish, and rather 

 smooth ; of a brownish colour ; spire very short, slightly 

 mucronated, volutions 4, rounded, posteriorly transversely 

 striated, striae radiating from the deep suture ; smooth ante- 

 riorly ; aperture circular, peritreme somewhat thickened and 

 reflected ; umbilicus broad ; operculum multi-spiral, with a 

 channelled border and shining inside. 



Found in the earth, under decayed leaves, in the Island 

 of Siquijor, by H. Cuming. 



