100 



T. suborbiculari, rufescente-fusca ; spira prominula, anfrac- 

 tibus quatuor rotundatis, albicante-subvariegatis, spiraliter 

 striatis, et subcarinatis ; sutura distincta, subcrenulata ; aper- 

 tura circulari, peritremate albo, tenui, subreflexo ; umbilico 

 parvo ; operculo crassiusculo, anfractibus quinque. 



Shell nearly orbicular, of a reddish brown colour ; spire 

 rather prominent, consisting of four rounded, spirally striated, 

 and somewhat carinated volutions, usually somewhat variega- 

 ted with whitish ; suture distinct, slightly crenulated; aperture 

 circular, with a white, thin, slightly reflected peritreme ; umbi- 

 licus small; operculum thickish, with five volutions. In Mr. 

 Cumings collection, locality unknown. 



27. C. sulcatum, (pi. xxiii. f. 31.) Oliv. Voyage dans le 

 Levant. C. costulatum nonnull. 



T. tenui, globoso-conoidea, unicolore, spira acuminatiuscula, 

 apice obtuso, papillari ; anfractibus 4-5, ventricosis, spiraliter 

 sulcatis, creberrime decussatis ; apertura circulari, superne 

 subangulata, peritremate tenui, continuo ; umbilico parvo, 

 spiraliter sulcato ; operculo pallido, maculo centrali satura- 

 tion, anfractibus oblique striatis. 



Shell thin, nearly globular, with a somewhat conoidal, sub- 

 acuminated, blunt pointed papillary spire ; volutions from 

 four to five, ventricose, spirally grooved, the grooves crossed 

 by very fine striae ; aperture circular, with a slight angle at the 

 upper part, peritreme thin, continuous, blunt edged ; umbilicus 

 small, spirally grooved ; colour violaceous or orange brown, 

 darker at the apex, and becoming gradually paler as it increases 

 in size, without any bands ; operculum pale coloured, with a 

 darker central spot, its volutions numerous and obliquely 

 striated. This is not the C. sulcata of Lamarck ; it was dis- 

 covered by Olivier and has since been found at Mehadia, in 

 the Bannat, by M. Partsch. 



28. C. glaucum. nob. (pi. xxiv. f. 39.) 



T. subgloboso-conica, crassiuscula, rufescente, glauco-tinc- 

 ta; spira mediocri, apice obtuso; anfractibus 5, subventricosis, 

 leevibus, tenerrime spiraliter striatis, striis posticis majusculis ; 

 sutura subobtecta, antice subcrenulata, linea impressa antica ; 

 apertura fere circulari, postice subangulata ; peritremate sub- 

 incrassato ; umbilico parvo, angusto. 



Shell subglobosely conical, thickish, of a reddish colour 

 with a glaucous tint ; spire of moderate length, with an obtuse 

 apex ; volutions five, rather ventricose, smooth and very finely 

 transversely striated, the posterior striee being the larger; su- 



