CYCLOSTOMID^. 281 



in the middle of the columellar side. P. grande, Graj' (Ixxv, 

 46, 4'7). 



CALLiA, Gra3^ Shell smooth, shining, pupiform ; aperture 

 without sinus ; peristome simple, thin. P. lubrica, Sowb. 

 (Ixxv, 48 ). 



HARGRAVESiA, H. Adams. (Hyalopsis, Pease.) Shell like 

 Pupina, but anterior marginal slit or canal absent, distinctly 

 channeled posteriorly. P. polita, H. Ads. (Ixxv, 50). 



PupiNELLA, Gray. 



Distr. — 13 sp. East Indies, Formosa, Philippines, Australia, 

 etc. P. pupiniformis, Sowb. (Ixxv, 51, 52 \ 



Shell oval-ol3long, covered with a thin, corneous epidermis ; 

 aperture circular ; peristome thick, reflected, slit on the anterior 

 left side and canaliculate at the suture. Operculum corneous, 

 multispiral. 



PUPiNOPSis, H. Adams, 1866. Peristome tubularly prolonged 

 on the penultimate whorl. P. Swinhoei, H. Ad. Formosa. 



Raphaulus, Pfeiffer. 



Syn. — Anaulus, Pfeiflfer. 



Distr. — 5 sp. East Indies. B. bombycinus, Pfr. (Ixxv, 53). 



Shell umbilicated, pupiniform, peristome double, internal 

 continuous, external dilated, perforated at the margin by a 

 canal ; canal sutural and internal, terminating anteriorly, and 

 embraced by the outer portion of the double peristome (it can 

 be traced externallj^ along the last whorl), and reaching into 

 the concavity of the spire. Operculum very thin, corneous ; 

 narrow-whorled. 



" The use of the sutural tube seems to be the preservation of 

 a communication with the external air when the aperture is 

 closed." — Benson. 



STREPTAULUS, Bcuson. Shell pupiniform, shining, ]:)eristome 

 circular, not continuous, with a subsutural internal tube, which 

 is reflexed at the aperture and runs along the suture externally. 

 1 sp. Himalaj^as. P. Blanfordi^ Benson (Ixxv, 54). 



Cataulus, Pfeiffer. 



Distr. — 17 sp. Ceylon. C. pyramidatus, Pfr. (Ixxv, 55). 



Shell pupa-shaped, with the base keeled, producing a channel 

 in the front of the aperture. Operculum circular, horny, the 

 whorls easily separable. Represents in Ceylon a group ap- 

 proaching Megalomastoma. The whorls of the operculum, when 

 macerated, separate and may be unrolled in spiral form. 



TORTULOSA, Gray. Last whorl solute. Nicobar. C. tortuosa, 

 Chemn. i Ixxv, 56-58). 



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