CYCLOSTOMA. 
Puate VIII. 
Species 41. (Mus. Cuming.) 
CYCLOSTOMA INSULARE. Cycl. testd perangusté umbili- 
cata, globoso-conicd, fuscescente-alba, ferrugineo tinctd, 
purpureo varie fasciatd, anfractibus rotundatis, spira- 
liter crebriliratis, liris lineis subscabris decussatis ; 
apertura circulari, labro parum reflexo. 
THE INSULAR CycLostoma. Shell very narrowly umbi- 
licated, globosely conic, brownish-white, tinged with 
rust, variously banded with purple, whorls rounded, 
spirally closely ridged, ridges crossed with rather 
scabrous lines; aperture circular, lip but little re- 
flected. 
PrerrFeER, Pro. Zool. Soc. 1852, p. 64. 
Hab. Mauritius. 
Dr. Pfeiffer describes this species as having a rather 
solid shell, but it seems to me of light substance. 
Species 42. (Fig. a, 6, Mus. Cuming.) 
CycLtostoma GoupoTiaNnuM. Cycl. testd angusté umbi- 
licata, globoso-conicd, tenuiculd, flavescente, nigricante- 
castaneo varié fasciatdé aut lineata, anfractibus con- 
vewis, tumidiusculis, levigatis; apertura circulari, 
labro tenué reflexo. 
Goupot’s CycLostoma. Shell narrowly umbilicated, 
globosely conic, rather thin, yellowish, variously 
banded or lineated with dark chestnut, whorls con- 
vex, rather swollen, smooth; aperture circular, lip 
thinly reflected. 
SoweErBy, Thes. Conch. p. 130. pl. 29. f. 193. 
Hab. Natal; Krauss. 
A prettily-painted species, of a different type from that 
of the Madagascar species. 
Species 43. (Fig. a, 6, Mus. Cuming.) 
CycLostoma IsaBELLA. Cyel. testd subangusté umbili- 
caté, globoso-turbinatd, rufescente-albd, anfractibus 
convexis, spiraliter sulcato-striatis ; apertura circu- 
lari, labro reflexo. 
Tue IsaBELLa CycLostoma. Shell rather narrowly um- 
bilicated, globosely turbinated, reddish-white, whorls 
convex, spirally groove-striated; aperture circular, 
lip reflected. 
Preirrer, MS. in Mus. Cuming. 
Hab. Madagascar. 
Of a peculiar reddish-fawn colour, spirally groove-stri- 
ated throughout. 
Species 44. (Fig. a, 4, Mus. Cuming.) 
CycLostoma SowsrByt. Cycl. testd modicé umbilicatd, 
globoso-turbinata, fulvo-ferrugined, rufo-fusco lineari- 
articulatd, anfractibus rotundatis, ad suturas impressis, 
liris obtusis spiraliter funiculatis ; aperturd circulari, 
labro lute calloso-reflexo. 
SowErBy’s Cyctostoma. Shell moderately umbilicated, 
globosely turbinated, fulvous-rust, linearly articulated 
with red-brown, whorls rounded, impressed at the 
sutures, spirally corded with obtuse ridges; aperture 
circular, lip broadly callously reflected. 
Cyclostoma megacheilus, Sowerby (not of Potiez and Mi- 
chaud), Thes. Conch. p. 131. pl. 31. f. 206. 
Cyclostoma Sowerbyi, Pfeiffer. 
2 
Hab. 
Delicately corded throughout with red-brown articulated 
linear ridges. 
Species 45. (Fig. a, 6, Mus. Cuming.) 
CycLosroMa CREPLINI. 
cata, globoso-conicd, tumidiusculd, ferrugineo-fusca, 
rufo lineari-articulatd, anfractibus convexis, ultimo 
multo majore, undique carinato-liratis, lira ad peri- 
pheriam prominentiore, acuto; apertura obliqué cir- 
Cycl. testa subangusté umbili- 
culari, labro crassé reflexo. 
Crepiin’s Cyctostoma. Shell rather narrowly umbili- 
cated, globosely conic, rather swollen, rust-brown, 
linearly articulated with red, whorls convex, the last 
much the larger, everywhere keel-ridged, ridge at the 
periphery more prominent, sharp ; aperture obliquely 
circular, lip thickly reflected. 
Dunker, Zeitsch. fiir Malac. 1848, p. 177. 
Hab. Zanzibar. 
Resembling the preceding species, in being encircled 
with red-articulated ridges; but the last whorl is much 
| broader and tumid. 
November, 1861. 
