CYCLOSTOMA. 
Prats XII. 
Species 70. (Mus. Cuming.) 
CYCLOSTOMA ELEGANS. 
ovatd, violaceo- vel lutescente-cesid, punctis rufo-fus- 
Cycl. testé angusté umbilicald, 
cescentibus subquadratis sepissime articulatd ; anfrac- 
tibus convexis, liris spiralibus subconfertis funiculatis, 
interstitiis striis longitudinalibus reticulatis ; apertura 
subpyriformi-rotundatd, superne sinuatd, labro  sim- 
plict. 
THE ELEGANT CycLostoma. Shell narrowly umbilicated, 
ovate, violet or yellowish-drab, mostly articulated 
with somewhat square red-brown dots; whorls con- 
vex, corded with rather close-set spiral ridges, the 
interstices being reticulated with longitudinal striz ; 
aperture somewhat pyriformly rounded, sinuated at 
the upper part, lip simple. 
Nerita elegans, Miller, Hist. Verm. vol. ii. p. 177. 
Turbo lincina, Chemnitz. 
‘Turbo elegans, Gmelin. 
Turbo striatus, Da Costa. 
Turbo reflecus, Olivi. 
Cyclostoma elegans, Draparnaud. 
Turbo marmoreus, Brown. 
Cyclostoma marmoreum, Sowerby. 
Hab. Central and southern Europe. 
- The only species of Cyclostoma inhabiting the British 
Isles. 
Species 71. (Mus. Cuming.) 
CYCLOSTOMA FALLAX. 
cylindraceo-turritd, albidd, lineis fleruosis fulvo-fusces- 
centibus longitudinaliter picta ; anfractibus convexis, 
struis spiralibus et longitudinalibus minutissimé la- 
Cycl. testé anguste umbilicatd, 
mellato-reticulatis, anfractu ultimo soluto, suturis pli- 
cato-crenatis ; aperturd oblique ovata, labro tenué sub- 
expanso. 
THE DECEITFUL CycLostoma. Shell narrowly umbili- 
cated, cylindrically turreted, whitish, painted longi- 
tudinally with fulvous-brown flexuous lines; whorls 
convex, very minutely lamellarly reticulated with 
spiral and longitudinal striz, last whorl loosened, 
sutures plicately crenated ; aperture obliquely ovate, 
lip thin, a little expanded. 
PFEIFFER, Pro. Zool. Soc. 1852, p. 65. 
Cistula? fallax, Pfeiffer. 
Hab. ———? 
Evidently belonging to the West India type of the 
genus, although the habitat is not given. 
Species 72. (Mus. Cuming.) 
CYCLOSTOMA, DISS£CTUM. 
cylindraceo-ovatd, solidiusculd, fulvescente, versus api- 
Cycl. testé angusté umbilicatd, 
cem rosaced; anfractibus convexis, spiraliter valide 
liratis, interstitiis obliqué iminutissime striatis, suturis 
angusté canaliculatis; aperturad parviusculd, oblique 
ovatd, labro simplici. 
THE cur CycLostoma. Shell narrowly umbilicated, cy- 
lindrically ovate, rather solid, fulvous-pink towards 
the apex; whorls convex, spirally strongly ridged, 
interstices obliquely very minutely striated, sutures 
narrowly channelled ; aperture rather small, obliquely 
ovate, lip simple. 
Sowersy, Thesaurus Conch. p. 105. pl. 24. f. 58, 59. 
Hab. ? 
The habitat of this species is not known, and it is of 
quite a distinct type from any other. The spiral ridges 
have almost the character of obtuse keels, and the sutures 
are distinctly channelled. 
Species 73. (Mus. Cuming.) 
CycLostoma aLBuM. Cycl. testd angustissime umbilicatd, 
ovato-conicd, opalind, nitidula ; anfractibus convewis, 
levibus, vel lonyitudinaliter minutissimeé striatis ; aper- 
turd pyriformi-ovata, labro simplici, subincrassato. 
THE wHite CycLtostoma. Shell very narrowly umbili- 
cated, ovately conic, opal-white, shining; whorls 
convex, smooth, or longitudinally very minutely 
striated ; aperture pyriformly ovate, lip simple, ra- 
ther thickened. 
Sowersy, Thesaurus Conch. p. 141. pl. 28. f. 154. 
Hab. Jamaica. 
Of a delicate semitransparent opaline-white aspect, ap- 
parently smooth, but very distinctly longitudinally striated 
beneath the lens. 
December, 1861. 
