CYCLOSTOMA. 
confertissime lamellato-striatis, striis ad suturas pli- 
cato-excurrentibus ; apertura pared, rotundatd, labro 
tenue dilutato, duplici. 
Tue Dominco CycLtostoma. Shell yery narrowly um- 
bilicated, cylindrically turreted, rather solid, whitish ; 
whorls obscurely spirally ridged, longitudinally very 
closely lamella-striated, strize plicately excurrent at 
the sutures; aperture small, rounded, lip thin, dilated, 
duplex. 
Prrirrer, Zeitschr. fiir Malac. 1850, p. 79. 
Hab. St. Domingo. 
This species may be recognized more by its size and 
general aspect; the details of sculpture are not very dis- 
tinctive. 
Species 113. (Fig. a, 6, Mus. Cuming.) 
CycLostoMA NoDULATUM. Cycl. tesld angustée wmbili- 
catd, cylindraceo-turritd, pellucido-albd ; anfractibus 
subangustis, rotundatis, longitudinaliter conspicue con- 
fertim lamellato-striatis, striis hie illic majoribus, ad 
suturas subexcurrentibus ; apertura parva, labro tenue 
dilatato, duplici, superné nodulato. 
THE NODULED CycLostoma. Shell narrowly umbilicated, 
cylindrically turreted, transparent-white; whorls ra- 
ther narrow, rounded, longitudinally conspicuously 
closely lamellarly striated, stria here and there larger, 
slightly excurrent at the sutures ; aperture small, lip 
thinly dilated, duplex, noduled at the upper part. 
Puate XVII. 
Pory, Mem. Cuba, vol. i. f. 104. pl. 5. f. 21. 
Ctenopoma rugulosum, var. Pfeiffer. 
Hab. Cuba. 
This is certainly distinct, as shown by the accompanying 
figures, from what I am led to believe is the type of C. 
rugulosum. It is a smaller more loosely convoluted shell, 
with the strize more developed in lamelle. 
Species 114. (Mus. Cuming.) 
CycLostoma soLipuM. Cel. testd vie uimbilicatd, cylin- 
draceo-turritd, alba ; anfractibus angustis, convexis, 
liris spiralibus regulariter funiculatis, interstitiis stris 
longitudinalibus clathratis ; aperturd oblique ovata, 
labro solido, parum expanso. 
Tue sotrp Cyctostoma. Shell scarcely umbilicated, 
cylindrically turreted, white; whorls narrow, convex, 
regularly corded with spiral ridges, the interstices 
being latticed with longitudinal striz ; aperture ob- 
liquely ovate, lip solid, but little expanded. 
Fruncatella solida, Menke, Synops. ed. 2. p. 131. 
Cyclostoma solidum, Pteifter. 
Hab. ——? 
This species, of which little is as yet known, has some- 
what the appearance of a Zruncatella, and was originally 
mistaken for that genus by Menke. Its finely spiral 
cord-like ridges are characteristic. 
