CYCLOSTOMA.—Piate I. 
circulari, fauce atro-fuscescente, labro albo, crassé re- 
flexo, calloso-ascendente. 
THE LARGE-LIPPED CYCLOSTOMA. 
binated, rather solid, brown-grey, spire rather shortly 
conical, whorls narrowly rounded, smooth, spirally 
linearly impressed, last whorl ridged around the um- 
bilicus ; aperture circular, interior tinged with black- 
brown, lip white, thickly reflected, callously ascend- 
ing. 
Preirrer, Pro. Zool. Soc. 1851, p. 242. 
Hab. Madagascar. 
Shell globosely tur- 
Distinguished by a remarkable broadly-reflected thicken- 
ing of the lip, which rises at its junction with the body 
whorl like a callous varix. 
Species 4. (Fig. a, 6, Mus. Cuming.) 
Cyctostroma MapDAGascARIENSE. Cycl. testa globoso- 
turbinatd, solidiusculd, cesid, medio purpureo lineari- 
fasciatd, spird conicd, anfractibus subanguste rotun- 
datis, ad peripheriam obsolete carinatis, levibus, ultimo 
circa umbilicum lirato ; apertura circulari, intus atro- 
fuscd, labro latissime expanso, conspicue ascendente, 
croceo. 
Tue MapaGascar CycLostoma. Shell globosely tur- 
binated, rather solid, grey, linearly banded with pur- 
ple about the middle, spire conical, whorls rather 
narrowly rounded, obsoletely keeled at the periphery, 
smooth, last whorl ridged around the umbilicus ; 
aperture circular, black-brown within, lip very broadly 
expanded, conspicuously ascending, saflron-coloured. 
Gray, Griffith’s Cuv. Anim. King. pl. 28. f. 4. 
Cyclostoma Duisabonis, Grateloup. 
Hab. Madagascar. 
It is extremely doubtful whether this and C. multifas- 
ciatum axe not varieties of the same species. 
Species 5. (Mus. Cuming.) 
CycLosToMA CAMPANULATUM. Cel. testd depresse lurbi- 
natd, cesid, fusco tinctd, infra peripheriam lineari- 
fusciald, anfractibus angusté rotundatis, undique spi- 
raliter tenué liratis, medio acutissimé unicarinatis ; 
apertura circulari, fauce atro-fused, labro late expanso, 
vivide sanguineo. 
THE BELL-SHAPED CycLosroma. Shell depressly tur- 
binated, grey, tinged with brown, linearly banded 
beneath the periphery, whorls narrowly rounded, spi- 
rally finely ridged throughout, very sharply keeled 
round the middle; aperture circular, black-brown 
within, lip broadly expanded, bright blood-coloured. 
Pruirrer, Zeitschrift fiir Malac. 1847. p. 57. 
Cyclostoma unicarinatum, Sowerby. 
° 
Hab. 
This approaches very nearly to C. dccarinatum ; it is 
more depressly turbinated and has a narrower periphery. 
The umbilicus appears to vary. 
