238 CYCLOSTOMUS $. 10. 
B Fasciis angustis fuscis interruptis. 
Cyclostoma fusco-lineatum 44dams Proc. Bost Soc. 1845. p. 11. *) 
— Bronnii var. 44dams Contrib. to Conch. N. 9. p. 180. 
Habitat in insula Jamaica. 
391 78. €. Iamellosus Adamsis. 
T. ovato- conica, subabbreviata, lamellis longitudinalibus 
confertis, acute elevatis, ad suturam prominentioribus munita, 
irregulariter et interrupte brunneo-lineata; apex truncatus, 
amissis 2— 3 anfractibus; spira curvilinearis; anfr. superst. 
3'/, convexi, ultimus bàsi spiraliter subsuleatus; apertura or- 
bicularis; perist. duplex :internum validum, productum, re- 
flexiusculum,. externum angustum, fere in planum aperturae 
reflexum, superne auriculatum. — Opere. 4'/,-spiratum, la- 
mella spirali vix elevata, laterahter valde producta. — Long. 
(trunc.) 0,49; lat. max. 0,4; lat. min. 0,94 poll. (Ad.) 
Cyclostoma lamellosum Adams in. Ann, Lyc. New-York V. N. 2. p. 54 
et Contrib. to Conch. N. 8. p. 138. **) 
Cyclostomus lamellosus Pfr. Consp. N. 348. 
Habitat in insula Jamaica. 
392 79. C. rugulosus EPfr. 
T. subperforata, cylindraceo-turrita, decollata, tenuis, 
costis longitudinalibus. confertis rugulosa, diaphana, cineras- 
centi-albida; anfr. superst. 4 convexi, lente accrescentes, ad 
suturam canaliculatam denticulati, ultimus subdisjunctus, pone 
aperturam callo lato, antice dentiformi cum penultimo junctus, 
basi obsolete spiraliter. sulcatus; apertura verticalis, oblique 
*) TT. C. Bronnii affini, fasciis angustis fuscis interruptis ornata, sutura 
haud multum crenulata, labro minore. Forsan var.? Alt. 0,55, lat. max. 
0,4, lat. min. 0,3 poll. (Adams l. c.) 
**) Shell ovate conie, rather short: with several inequidistant unequal 
more or less interrupted spiral lines of brown, of which four or five appear 
on the penult whorl: with rather closely set sharp elevated transverse la- 
mellae, which are more prominent at the sutures, without spiral striae ex- 
cept a few ridges in the umbilicus: apex truncate with the loss of two or 
three whorls: spire with the outlines quite convex: about three and one-half 
whorls remaining, very convex, with a rather deep suture: aperture orbic- 
ular, with two peritremes, of which the outer one is narrow, auriculate 
above, reflected nearly into the plane of the aperture; the inner peritreme 
is rather stout, well produced, alittle reflected. 'The operculum has a spiral 
lamella, which has about four and one-half whorls, and is but little elevated 
and much produced lateralll. Mean divergence about 509. — This shell 
much resembles C. fectilabre, but the outer peritreme is more expanded, 
and the margin of the operculum is not reflected backwards. 
