CYCLOSTOMA. 
PLATS 
Species 62. (Mus. Cuming.) 
CycLostoma Bronnt. 
ovato-lurritd, cinerco-fuscd, punctis rufis aliqguando 
Cycl. testd anguste umbilicatd, 
obsoleté notatd ; anfractibus rotundatis, longitudinali- 
ter confertissimé costulato-striatis, sericinis, striis ad 
suturas plicatis; apertura circulari, parviusculd, la- 
bro anguste finbrialo, fimbrid superne sinuatd. » 
Bronn’s Cyciostoma. Shell narrowly umbilicated, 
ovately turreted, ash-brown, sometimes obsoletely 
marked with red dots ; whorls rounded, longitudinally 
very closely rib-striated, silky, striae puckered into 
folds at the suture; aperture circular, rather small, 
lip narrowly fimbriated, frill sinuated at the upper 
part. 
Apams, Pro. Nat. Hist. Soc. Boston, U.S. 1845, p. 11. 
Cyclostoma papillare, Férussac (ined.). 
Cyclostoma fusco-lineatum, Adams. 
Hab. Jamaica. 
Remarkable for the silken texture of its surface, arising 
from the regularity and close arrangement of the rib-like 
striae. 
Species 63. (Mus. Cuming.) 
CycLOsTtoMA LVIGATUM. 
bilicatd, ovato-globosd, fulvd, castaneo varie zonatd ; 
Cycl. testé angustissime um- 
anfractibus ventricosis, spiraliter regulariter liratis, 
ad suturas fimbriato-crenatis ; apertura subcirculari, 
labro via reflexo. 
THE sMOOTH CycLostoma. Shell very narrowly umbili- 
cated, ovately globose, fulvous, variously zoned with 
chestnut ; whorls ventricose, spirally regularly ridged, 
fimbriately crenated at the sutures; aperture nearly 
circular, lip scarcely reflected. 
Wess and Bertuetor, Moll. Canar. p. 322. 
Cyclostoma Canariense, D’Orbigny. 
Hab. Vsland of Teneriffe, Canaries. 
A delicately painted ventricose type, plicately crenated 
at the sutures. 
Species 64. (Mus. Cuming.) 
CycLosToMA UNDULATUM. Cycl. testd angustissime un- 
bilicatd, globoso-conicd, fulvd, purpureo unifasciatd ; 
XT. 
anfractibus undigue spiraliter lineari-sulcatis, ad su- 
turas undato-plicatis ; apertura circulari, labro parum 
reflexo. 
(HE WAVED CYCLOSTOMA. 
licated, globosely conic, fulvous, one-banded with 
Shell very narrowly umbi- 
purple; whorls spirally linearly grooved throughout, 
wave-plaited at the sutures; aperture circular, lip 
but little reflected. 
Cyclostoma fimbriatum, Lamarck (uot of Schumacher nor 
Quoy and Gaimard), Anim. sans vert. vol. vill. p. 
360. 
Cyclostoma undulatum, Sowerby. 
Tab. Mauritius. 
Curiously distinguished at the suture by a nodulously 
waved plication. 
Species 65. (Mus. Cuming.) 
CYcCLOsTOMA sEMIDECUSSATUM. Cycl. testd profunde 
depressé orbiculari-umbilicatd, subpellucido-albd, epi- 
dermidv corned stramined indutd ; anfractibus angus- 
tis, longitudinaliter dense irregulariter corrugato-stri- 
atis; apertura pyriformi-circulari, labro simplict. 
THE SEMIDECUSSATED CycLostoma. Shell deeply um- 
bilicated, orbicularly depressed, semitransparent 
white, covered with a horny, straw-coloured epider- 
mis; whorls narrow, longitudinally densely irregu- 
larly wrinkle-striated; aperture pyriformly circular, 
lip simple. 
Prerrrer, Zeitschr. fiir Malac. 1847, p. 106. 
Hab. ? 
The shell here figured is labelled in Mr. Cuming’s col- 
lection, by Dr. Pfeiffer, as his C. semédecussatum, and a 
variety of C. citrinum, Sowerby. The two species appear 
to me to be distinct. 
Species 66. (Mus. Cuming.) 
CycLostoma suLcATUM. Clyel. testa angustissime umbi- 
licatd, ovato-turritd, alba vel carned ; anfractibus ro- 
tundatis, spiraliter undique regulariter liratis, liris 
sepe alternatim majoribus, interstitus strtis decussatis ; 
apertura subcireulari, superne sinuatd, labro simplici. 
Tur GRroovep CycLostoma. Shell very narrowly um- 
December, 1861. 
