234 
CYCLOSTOMUS §. 10. 
Cyclostoma thysanorhaphe Chemn. ed. II. N. 75. p. 81. t. 10. f. 16 — 18. 
Choanopoma thysanoraphe Gray Catal. Cycloph. p. 53. N. 26. 
Cyclostomus thysanorhaphe Pfr. Consp. N. 343. 
Habitat in insula Jamaica. 
385 72. C. Redfieldiamis Adams* * 
T. perforata, ovato-conica, tenuis, longitudinaliter confer- 
tissime plicata, sericina, albida, fusco seriatim maculata, vel 
violaceo-fusca, punctis saturatioribus seriatis picta; spira conica, 
breviter truncata, superne nigricans, distinctius costata; sutura 
profunda, nodulis albis irregulariter distantibus crenata; anfr. 
superst. 3'/. 2 convexi, celeriter accrescentes, ultimus rotundatus; 
apertura verticals, subcircularis ; perist. duplex : internum bre- 
viter porrectum, externum angulatim patens, ad anfr. penulti- 
mum excisum, superne in corniculum cavum, latere columellari 
in alam latiusculam, crenulatam dilatatum. — Operc. praece- 
dentis. — Long. 17, diam. 10 mill. Ap. 7 mill, longa. (Coll. 
Nr. 160. Spec, authent.) 
Cyclostoma Redfieldianum Adams Contrib. to Conch. N. 1. p. 10. *) 
— — Chemn . ed. II. N. 263. t. 37. f. 7. 8. 
Cyclostomus Redfieldianus Pfr. Consp. N. 344. 
ft. Spira vix truncata, anfr. 6, ultimo acute costato-striato , perist. interno 
expanso, adnato ; long 17, diam. 9 mill. (Mus. Cuming.) 
Habitat in insula Jamaica. 
Obs. An varietas praecedentis ? 
3—6 rotundatis, transversim striatis, fusco interruptim fasciatis, marginibus 
superioribus plicato-fimbriatis ; (suiura crenulata ;) apertura circulari, peri- 
tremate interno crassiusculo levatiusculo , externo dilatato-patente ; umbilico 
parvo ; operculo extus anfr. 5 — 6 oblique striatis. — Demerara et Antill. 
(Sow. 1. c.) 
*) Shell ovate - conic ; pale blueish gray or dingy white , with a few 
spiral interrupted lines of dark brown ; strongly striated transversely, without 
spiral striae ; spire with rather convex outlines ; apex truncate with the loss 
of two whorls; three and one -half quite convex whorls remaining, with a 
deep suture, which has a few strong unequal, inequidistant crenulations ; 
aperture large, nearly orbicular; inner peritreme a little produced and re- 
flected ; outer pejgtareme wanting on the upper part of the left side , much 
expanded on the remaining part of this side, moderately spread on the outer 
side, concave, sharp-edged, above often inflected so as to form a cell; um- 
bilicus small. Mean divergence 55°; length 0,66, greatest breadth 0,5, least 
breadth 0,4 inch. (Adams 1. c.) 
