CYCLOSTOMA.—Ptate XIX. 
Sowersy, Thes. Conch. p. 97. pl. 23. f. 17. 
Otopoma politum, Gray. 
lab. ——? 
Of a deep reddish-chestnut colour, obscurely reticulately 
freckled with white. 
Species 126. (Mus. Cuming.) 
CycLostoma GuILLAINI. Cycl. testa oblecté umbilica- 
td, pyramidali-globosd, solidiusculd, cerulescente-alba, 
opacd, anfractibus rotundatis, longitudinaliter oblique 
plicato-striatis, spiraliter malleatis et subtilissimé li- 
ratis ; apertura subpyriformi-rotundatd, fauce aurantio- 
vitellind, fasciati, labro calloso-reflexo, callositate super 
umbilicum late expansd. 
GUILLAIN’s CYCLOSTOMA. 
licus, pyramidally globose, rather solid, bluish-white, 
rounded, longitudinally obliquely 
plicately striated, spirally malleated and very finely 
Shell with a covered umbi- 
opake, whorls 
ridged; aperture somewhat pyriformly rounded, in- 
terior orange-yelk colour, banded, lip callously re- 
flected, with a callosity widely expanded over the 
umbilicus. 
Perit, Journ. Conch. 1850, vol. i. p. 51. pl. 4. f. 3. 
Hab. Mogadore, North Africa. 
A very characteristic species, allied to the large C. Nati- 
coides, which is a native of South Africa. 
Species 127. (Fig. a, 6, Mus. Cuming.) 
Cycrosroma Comorense. Cycl. testd minute obtecte 
umbilicatd, ovato-conicd, solidd, rufo-castaneo tincta 
et lineatd, anfractibus convewis, longitudinaliter dense 
capillaceo-striatis et rugatis; apertura subpyriformi- 
rotundatd, labro simplici, calluso, subflexuoso. 
Tue Comoro Cyciostoma. Shell with a minute covered 
umbilicus, ovately conical, solid, stained and lineated 
with reddish-chestnut, whorls convex, longitudinally 
densely hair-striated and wrinkled; aperture some- 
what pyriformly rounded, lip simple, callous, rather 
flexuous. 
Preirrer, Pro. Zool. Soc. 1854, p. 151. 
Otopoma Comorense, Pfeiffer. 
Hab. Comoro Islands, Africa. 
Allied, in details of colour and striation, to C. mz/tili- 
neatum, but of a more slenderly ccnical form. 
Species 128. (Mus. Cuming.) 
CYCLOSTOMA VITELLINUM. 
licatd, conico-turbinatd, rubello-flavd, apice nigrescente, 
Cycl. testa snbanguste nmbi- 
anfractibus declivi-rotundatis, spiraliter densé liratis, 
interstitiis striis obliquis cancellatis ; apertura subpy- 
riformi-rotundatd, labro simplict. 
THE YELK-yELLOW CycLostoma. Shell rather narrowly 
umbilicated, conically turbmated, reddish-yellow, 
blackish at the apex, whorls slopingly rounded, spi- 
rally densely ridged, interstices cancellated with ob- 
lique striz; aperture somewhat pyriformly rounded, 
lip simple. 
Prerrrer, Pro. Zool. Soc. 1851. 
Otopoma vilellinum, Pfeiffer. 
TIab. Madagascar. 
Turbinated with a rather sharply conical spire, densely 
ridged, the interstices being minutely cancellated. 
