CYCLOSTOMA.—Puarte VII. 
the periphery, encircled with close-set raised strie ; 
aperture circular, lip scarcely reflected. 
PFEIFFER, Pro. Zool. Soc. 1852, p. 147. 
Hab. ? 
This species is founded upon a specimen in a very im- 
perfect bleached state. 
Species 39. (Mus. Cuming.) 
CycLostoma UNICOLOR. Cyel. testa excavato-umbilicata, 
globoso-turbinatd, solidd, opaco-albidd, ad apicem fus- 
cescente, anfractibus spiraliter lirato-striatis, ad peri- 
pheriam obtuse carinatis, in umbilicum valide carinatis ; 
apertura circulari, labro breviter reflexo. 
THE ONE-COLOURED CycLostoma. Shell excavately um- 
bilicated, globosely turbinated, solid, opaque-white, 
brownish at the apex, whorls spirally ridge-striated, 
obtusely keeled at the periphery, strongly keeled 
within the umbilicus; aperture circular, lip shortly 
reflected. 
2 
Hab. 
The form of this species is very characteristic, but it is 
devoid of colour, except in the vicinity of the apex. 
Species 40. (Mus. Cuming.) 
CycLostoMa MQUIVOCUM. 
licatd, conico-turbinatd, solidiusculd, flavescente-alba, 
rufo-castaneo obscuré trifasciatd, anfractibus rotun- 
datis, undique rugoso-malleatis ; apertura circulari, 
labro duplici, interno sanguineo-rufo, externo plano- 
fimbriato. 
THE DOUBTFUL CycLostoma. Shell compressly umbi- 
licated, conically turbinated, rather solid, yellowish- 
white, encircled with three obscure red-brown bands, 
whorls rounded, everywhere roughly malleated ; aper- 
ture circular, lip duplex, inner lip blood-red, outer 
lip flatly frilled. 
Pretrrer, MS. in Mus. Cuming. 
Cycl. testa compresse umbi- 
| It is a little doubtful whether this species belongs to 
| this section of the family. 
