CYCLOPHORIDA. 165 
or brownish; inner edge continuous, broadly expanded, ap- 
pressed ; outer edge broader, expanded horizontally, sinuate 
and angulated above, shortly interrupted on the penultimate 
whorl. Operculum like that of C. thysanorhaphe. Length 20, 
breadth 11 mill. 
Cyclostoma solidum, Adams, Contrib. to Conch. p. 7. (Not 
Menke.) 
Cyclostoma Jayanum, Adams, Contrib. to Conch. n. 4, p. 50; Pfr. 
Ic. n. 310, t. 40, f. 32, 33. 
Cyclostoma histrio, Pfr. in Proc. Zool. Soc. 1851. (Jul.) 
Cyclostomus Jayanus, Pfr. Consp. n. 345 ; Pneum. Mon. p. 235. 
Hab. Jamaica. 
75. Cycntostomus BANKSIANUS. 
Shell shortly rimate and perforated, ovate-conic, rather thin, pale 
fuscous, with orange-coloured stripes, or blackish-violaceous, 
obsoletely girdled with interrupted reddish-brown lines, very 
closely sculptured with subtle longitudinal folds, which are 
undulated sometimes, and some of which, at rather regular dis- 
tances, are stronger; spire conic, subtruncate; suture fringed; 
whorls remaining 3$, convex, the last one rounded, orange- 
coloured anteriorly, grooved spirally round the very narrow um- 
bilicus; aperture perpendicular, circular, blood-red within; pe- 
ristome blood-red, double ; inner edge slightly expanded; outer 
edge shortly expanded, slightly indented on the penultimate 
whorl, somewhat auriculated above. Operculum like that of C. 
costulatus, Zg/. Length 15, breadth 93 mill. 
Cyclostoma Banksianum, Sow. Thes. n. 148, p. 144, t. 29, f. 194; 
"Pfr. Ic. n. 165, p. 154, t. 21, f. 7, 8, t. 44, £.17, 18. 
Cyclostoma hyacinthum, Adams, Contrib. to Conch. p. 9. 
Choanopoma Banksianum, Gray, Cat. Cycl. p. 52, n. 19. 
Cyclostomus Banksianus, Pfr. Consp. n. 346; Pneum, Mon. 
p. 235. 
Hab, Jamaica, Manchester Mountains. 
76. CycLostomus YALLAHENSIS. 
This shell resembles C. Banksianum, but it is smaller and more 
slender; the colour is blueish-brown, and does not change by 
age or exposure into orange near the aperture; the striz are 
coarser ; the oblique indentations are often obsolete, The oper- 
culum is similar to that of C. Banksianum. Mean divergence 
gout 46°; length 0,48, greatest breadth 0.32, least br. 0.27 
inch. 
Cyclostoma Yallahense, Adams, Contrib. to Conch. n. 9, p. 156. 
