101 



ture partly covered by the edge of the next volution, which is 

 slightly crenulated, with an impressed anterior line; aperture 

 nearly circular, rather angulated posteriorly ; peritreme some- 

 what thickened ; umbilicus small, narrow. Brought by M. 

 Hoffman, locality unknown. 



29. C. PARVUM.(pl. xxxi. f. 254, 255.) 



T. suborbiculari, depresso-conoidea, tenui, laevigata, fulves- 

 cente,radiatimfusco-strigata,|spira]brevi, submucronata,anfrac- 

 tibus 5 rotundatis, tenerrime spiraliter striatis, obsoletissime 

 4 ad 5carinatis ; apertura circulari, peritremate simplici, pos- 

 tice subemarginato, umbilico magno; operculo corneo, crasso. 

 Shell suborbicular, depressedly conoidal, thin, smoothish, 

 yellowish brown, with dark brown radiating stripes ; spire 

 short, somewhat mucronated, with five rounded, very finelv 

 spirally striated volutions, the last volution large, with 4 or 5 

 exceedingly obsolete keels : aperture circular, peritreme sim- 

 ple, slightly emarginated posteriorly ; umbilicus large ; oper- 

 culum horny, thick. From the Island of Zebu, Mr. Cuming. 



30. C. ELEGANS. (pi. xxiii. f. 32, 33.) Auctm. 



T. oblongo-subacuminata, spira obtusa, submamillari ; 

 anfractibus 4-5, ventricosis, spiraliter sulcatis, creberrime 

 decussatis ; sutura distincta, rotundato-subexcavata; apertura 

 subrotundata, superne subangulata; peritremate tenui, con- 

 tinuo ; umbilico minimo ; operculo paUido, macula subcentrali 

 fusca, anfractibus paucis, oblique striatis. 



Shell of a rather acuminated oblong shape, with an 

 obtuse, rather mamillary apex; volutions 4 — 5, ventricose, 

 spirally grooved and very finely decussated ; suture distinct, 

 somewhat rounded ; aperture nearly round, somewhat angular 

 at the upper part ; peritreme thin, continuous, blunt edged ; 

 umbilicus very small ; operculum pale coloured, with a nearly 

 central dark spot, its whorls few, obliquely striated. Europe. 



31. C. MARMOREUM. (pi. xxiii. f.34, 35.) Browu inEdin. 

 Journ. of Nat. and Geogr. Science, vol. 1. 



T. oblongo-subacuminata, apice obtuse, submamillari ; 

 anfractibus quatuor, ventricosis, marmoratis, nitidis ; sutura 

 distincta; apertura subrotunda, superne subangulata; peri- 

 tremate tenui, continue ; umbilico minimo. 



Shell of a rather acuminated oblong shape, with an obtuse 

 rather mamillary apex ; volutions 4, ventricose, of a dark 

 colour, marbled with Avhite, quite smooth and shining ; suture 

 distinct ; aperture nearly round, rather angular at the upper 



