CNC OFS TO! MAY, 
Puate XVII. 
Species 108. (Mus. Cuming.) 
CycLosTOMA HONESTUM. Cycl. testa obtecté umbilicatd, 
oblongo-turritd, albida, ferrugineo tincté ; anfractibus 
angustis, rotundatis, longitudinaliter confertissime la- 
mello-striatis, striis ad suturas plicato-excurrentibus ; 
apertura parva, oblique rotundatd, labro concavo- 
dilatato, utringue subauriculato, superné ad suturam 
nodulato. 
Tur NEAT CycLostoma. Shell with a covered umbilicus, 
oblong-turreted, whitish, tinged with rust; whorls 
narrow, rounded, longitudinally very closely lamel- 
jarly striated, striz plicately excurrent at the su- 
tures; aperture small, obliquely rounded, lip con- 
eavely dilated, slightly auriculated on each side, 
noduled at the upper part in the suture. 
Pory, Mem. Cuba, vol. i. p. 103. pl. 7. f. 1-4. 
Ctenopoma honestum, Pfeiffer. 
Hab. Cuba. 
The longitudinal striz are like fine hair-lamelle, rising 
a little at the sutures. 
Species 109. (Mus. Cuming.) 
CYCLOSTOMA ROTUNDATUM. 
oblongo-turrita, pellucido-albd ; anfractibus rotundatis, 
spiraliler obscuré liratis, longitudinaliter dense snb- 
Cyel. testa viv umbilicata, 
tilissime capillaceo-striutis; aperturd pared, rotundatd, 
labro plano-dilatato. 
THE ROUNDED CycLostoma. Shell scarcely umbilicated, 
oblong-turreted, transparent-white ; whorls rounded, 
spirally obscurely ridged, longitudinally densely very 
finely hair-striated ; aperture small, round, lip flatly 
dilated. 
Porgy, Mem. Cuha, vol. i. p. 419. pl. 34. f. 19-21. 
Ctenopoma rotundatum, Pfeiffer. 
Hab. Cuba. 
The longitudinal sculpture is in this species of the finest 
possible character, but still with a tendency to lamella 
structure. 
Species 110. (Mus. Cuming.) 
CycLostoma WrLkInsonit. Cyel. testd angusté umbili- 
cata, cylindraceo-turritd, semipellucido-albd ; anfrac- 
tibus angustis, rotundatis, lonyitudinaliter subtiliter 
lamellato-striatis, striis ad suturas modice plicato-cx- 
currentibus, aufractu ultimo subsoluto; apertura pared. 
rotundatd, labro fimbriato-dilatato. 
Witxrinson’s Cyciostoma. Shell narrowly umbilicated, 
cylindrically turreted, semitransparent-white ; whorls 
narrow, rounded, longitudinally finely lamellarly 
striated, striae moderately plicately excurrent at the 
sutures, last whorl partially unrolled ; aperture small, 
rounded, lip fimbriately dilated. 
Apams, Contrib. to Conch. No. 1. p. 6. 
Cyclostoma modestum, Adams. 
Hab. Jamaica. 
Another very delicately lamella-striated species, more 
narrowly convoluted than the preceding, with the last 
whorl partially unrolled next the aperture. 
Species 111. (Fig. a, 6, Mus. Cuming.) 
CyYcLosToMa RUGULOSUM. Cyel. testd anguste umbilicatd, 
cylindraceo-turritd, pellucido-albé ; anfractibus ro- 
tundatis, striis spiralibus et longitudinalibus undique 
confertim exquisite lamellato-clathratis, slriis hic illic 
ad suturas plicatis ; apertura ovata, labro subexpanso. 
THE RUGULOSE CycLostoma. Shell narrowly umbili- 
eated, cylindrically turreted, transparent-white ; 
whorls rounded, closely exquisitely latticed through- 
out with spiral and longitudinal lamellar striae, strize 
here and there plicated at the sutures ; aperture ovate, 
lip slightly expanded. 
Prerrrer, in Wiegm. Arch. f. Nat. 1839, p. 356. 
Cyclostoma clathratum, Gould. 
Cyclostoma verecundum, Poey. 
Cyclostoma denegatum, Poey. 
Cistula ruguiosa, Gray. 
Hab. Cuba. 
The last whorl inclires to become detached from the 
body-whorl on reaching maturity. 
Species 112. (Fig. a, 4, Mus. Cuming.) 
CycLtostoma DoMINICENSD. 
umbilicatd, cylindraceo-turritd, solidiusculd, albidd ; 
anfractibus obscuré spiraliter liratis, longitudinaliter 
Cycl. testd angustissine 
December, 1861. 
