CYCLOSTOMA:—Puate XV. 
white, shining; whorls rounded, lightly and closely | 
spirally ridged at the upper part, then smooth ; aper- 
ture nearly circular, lip simple, slightly reflected. 
PFEIFFER, Pro. Zool. Soc. 1852, p. 65. 
Hab. Caroline Islands, North Pacitic. 
Distinguished by having the upper part of the whorls 
faintly spirally ridged, while the middle and lower parts 
are smooth. 
Species 98. (Mus. Cuming.) 
CycLostoMA BANKSIANUM. 
umbilicatd, ovato-turritd, cinerco-grised, ferrugineo- 
rufo interdum tinctd ; anfractibus rotundatis, longi- 
tudinaliter laminari-liratis, liris subdistantibus, ad 
suturas plicatis, interstitiis dense minuté reticulatis ; 
apertura circulari, labro tenut, subreflexo. 
Banks’ CycLostoma. Shell very narrowly umbilicated, 
ovately turreted, ash-grey, sometimes tinged with 
rust-red; whorls rounded, longitudinally laminarly 
ridged, ridges rather distant, puckered at the sn- 
tures, interstices densely minutely reticulated ; aper- 
ture circular, lip thin, slightly reflected. 
Cycl. testa angustissime 
SowersBy, Thesaurus Conch. p. 144. pl. 29. f. 194. 
Hab. Jamaica. 
In this variety of the puckered type the rib-like stri 
| are enlarged into laminar ridges and widely separated, the 
interstices being densely reticulated. 
Species 99. (Mus. Cuming.) 
CYCLOSTOMA FASCICULARE. Cycl. lestd angustissimé um- 
bilicatd, ovato-turritd, fuscescente subsericed ; anfrac- 
tibus rotundatis, longitudinaliter confertissimé capil- 
laceo-striatis, stris ad suturas fasciculato-plicatis ; 
apertura subobliquée ovata, labro plano-fimbriato. 
THE FASCICULATED CycLostoma. Shell very narrowly 
umbilicated, ovately turreted, pale-brown, somewhat 
silky ; whorls rounded, longitudinally very closely 
hair-striated, striz fasciculately plicated at the su- 
tures; aperture rather obliquely ovate, lip flatly fim- 
briated. 
PreIrrer, Pro. Zool. Soc. 1851, p. 245. 
Hab. ? 
The habitat of this species is not given, but it is of the 
well-known Jamaica type, the longitudinal strize being as 
fine as hairs. 
