CYCLOSTOMUS §. 5. 6. 
119 
fulva infra medium signatus; umbilicus profundus, V 4 diametri 
fere aequans; apertura. obliqua, subcireularis, intus concolor, 
nitida; perist. mediocriter expansum et revolutum, margine 
columellari in laminam latissimam, superne adnatam, umbili- 
cum semioccultantem, dilatato. — Operc. ? — Diam. mai 28 
min. 22, alt. 16 mill. Ap. oblique 13 mill, longa, 11 iata! 
(Mus. Cuming.) 
Cyclostoma castum (Cyclostomus?) Pfr. in Proc. Zool. Soc. 1854. p. 150. 
— Pfr. Novit. conch. I. p. 9. n. 15. t. 3. f. 10. 11, 
f. Anfractu ultimo antice longe soluto, dorso carinato: 
Cyclostoma castum monstr. Pfr. Ibid. t. 3. f. 12 . 13. 
Habitat in insula Madagascar, 
45. C.? virgo Pfr, 
T* e umbilicata, turbinato-globosa, depressiuscula , tenuis, 
confertim striata et liris spiralibus (quarum singulis validiori- 
bus) asperato - granulata , baud nitens, diaphana, albido-ful- 
vescens, castaneo trifasciata; spira breviter turbinata, vertice 
submamillari ; anfract. 5 convex!, rapide accrescentes, ultimus 
rotundatus; umbilicus profundus, i / 6 diametri vix superans; 
apertura obliqua, subangulato-subcircularis, intus nitida; perist. 
dilatatum, undique subrectangule patens, nitidum , albidum* 
castaneo-maculatum, superne subfornicatum , margine sinistro 
crenulatum , supra umbilicum in laminam magnam superne 
adnatam dilatatum. — Operc.? — Diam. maj. 26, min. 21 
alt. 15 mill. Ap. 12 mill, longa, 10y 2 lata. (Mus. Cuming.) 
Cyclostoma virgo (Cyclostomus?) Pfr. in Proc. Zool. Soc. 1854. p. 150. 
— — Pfr. Novit. conch. I. p. 10. n. 16. t. 3. f. 14. 15. 
Habitat in insula Madagascar. 
* 
46. Sowerbyl Pfr. (Coll. 217. — Gray Phan. p. 
148. — Ad. Gen. p. 291. Cyclostoma mega - 
chains Sow.) ............. M on. p. 212. 
§• 6 . 
47 
48 
49 
• aplustre Sow. ( Ch . ed. nov. p. 249. t. 33. f. 
5 7. Gray Phan. p. 139. — Cyclostomus aplu - 
stris Ad. Gen. p. 291.) . . 
. asper Pot. et Midi. (Gray Phan. p. 149. — 
Ad. Gen. p. 291. — Cyclost. Harveyanum Sow.) 
• pyrostoiiius Sow. ( Ch . ed. nov. p. 251. t. 34. 
f. 1. 2. — Gray Phan. p. 150. — Ad. Gen. p. 291. 
— Cyclost. hacmastoma Grat.) 
Mon. 
p. 
212 . 
213. 
214. 
