CYCLOSTOMA. 
Pirate VII. 
Species 34. (Mus. Cuming.) 
CycLostoMA ENCAUSTICUM. Cycl. testd subampliter per- 
spective umbilicatd, depressé globosd, candida, infra 
peripheriam obscure rufo-fusco fasciatd, anfractibus 
subangustis, undique creberrimé reticulatis ; apertura 
oblique ovatd, labro tenue reflexo, supra wmbilicum 
peculiariter latissimé tenué expanso, 
THE ENAMELLED CycLostoma. Shell rather largely per- 
spectively umbilicated, depressly globose, white, ob- 
scurely banded with red-brown beneath the peri- 
phery, whorls rather narrow, everywhere very closely 
reticulated; aperture obliquely ovate, lip thinly re- 
flected, peculiarly very broadly thinly expanded over 
the umbilicus. 
Hab. > 
A very characteristic pure-white species, conspicuously 
finely reticulated throughout its surface, with the lip pe- 
culiarly expanded over the umbilicus, so as to form a broad 
thin lamina of shining white enamel. 
Species 35. (Fig. a, 6, Mus. Cuming.) 
CYCLOSTOMA DELICIosuM. Cyel. testé modicé umbili- 
cata, globoso-turbinatd, tenuiculd, cinnamomed, anfrac- 
tibus supra declivi-convexis, deinde rotundatis, carinis 
tribus albidis subtilibus pluribusque minoribus cingu- 
latis ; aperturd circulari, labro tenué reflexo. 
THE PRETTY CycLtostoma. Shell moderately umbili- 
cated, globosely turbinated, rather thin, cimnamon-co- 
loured, whorls slopingly convex above, then rounded, 
encircled with three fine whitish keels and several 
smaller ones; aperture circular, lip thinly reflected. 
FrErussac, Sowerby, Thes. Conch. Supp. p. 162. pl. 31 B. 
f. 314, 315. 
Hab. Madagascar. 
A delicate cinnamon-coloured shell, encircled with seve- 
ral fine thread-like whitish keels. 
Species 36. (Fig. a, 6, Mus. Cuming.) 
CYcCLOSTOMA CARINIFERUM. Cycl. testé ampliter per- 
spective umbilicatd, depressd, subdiscoided, aurantio- 
fulva, fusco subtilissimé lineari-articulatd, anfractibus 
subangustis, rotundatis, carinis filiformibus numerosis 
cingulatis ; apertura circulari, labro expanso, vivide 
aurantio-rufo. 
THE KEELED CycLostoma. Shell largely perspectively 
umbilicated, depressed, nearly discoid, orange-ful- 
vous, finely linearly articulated with brown, whorls 
rather narrow, rounded, encircled with numerous 
thread-like keels; aperture circular, lip expanded, 
bright orange-red. 
SoweErsy, Spec. Conch. f. 197, 198. 
Cyclostoma spectabile, Petit. 
Hab. Madagascar. 
An elegantly-formed thread-keeled shell, with a deep 
orange-red lip. 
Species 37. (Fig. a, 6, Mus. Cuming.) 
CycLostoMa CHLOROTICUM. Cyl. testd perspective um- 
bilicatd, orbiculari-depressd, tenuiculd, alba, lutescente 
pailidissimé fasciatd, anfractibus oblique striatulis, 
liris confertis inequalibus circa umbilicum validiori- 
bus cingulatis; apertura circulari, labro parum re- 
leno. 
THE YELLOWISH CycLostoma. Shell perspectively um- 
bilicated, orbicularly depressed, rather thin, white, 
very faintly banded with yellow, whorls obliquely 
finely striated, encircled with close-set unequal ridges, 
which are stronger around the umbilicus; aperture 
circular, lip but little reflected. 
Prerrrer, Pro. Zool. Soc. 1854, p. 161. 
Hab. Madagascay. 
The faint yellowish bands of this subdiaphanous shell 
are probably indications of a darker colouring than has 
yet been observed. 
Species 38. (Mus. Cuming.) 
CycLosToMa sTRIATULUM. Cyel. testd subanguste pro- 
fundé umbilicata, globoso-turbinatd, solida, flavescente 
albidd, anfractibus convexis, ad peripheriam obscuré 
angulatis, striis confertis elevatis cinctis ; apertura 
circulart, labro vix reflexo. 
THE FINELY-sTRIATED CycLostoma. Shell rather nar- 
rowly deeply umbilicated, globosely turbinated, solid, 
yellowish-white, whorls convex, obscurely angled at 
November, 1861. 
