234 CYCLOSTOMUS $. 10. 
Cyclostoma thysanorhaphe Chemn. ed. Il. 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. €. Redfieldianus 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'/, convexi, celeriter accrescentes, ultimus rotundatus ; 
apertura verticalis, subcircularis; perist. duplex:internum bre- 
viter porrectum, externum angulatim patens, ad anfr. penulü- 
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  Redficldianum Adams Contrib. to Conch, N. 1. p. 10. *) 
s Ss Chemn.'ed. II, N. 263. t, 37. f 7. 8. 
Cyclostomus Redfieldianus Pfr. Consp. N. 344. 
8. 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; (su(ura crenulata :) apertura circulari, peri- 
tremate interno crassiusculo levatiusculo, externo dilatato-patente; umbilico 
parvo; opereulo extus anfr. 5 — 6 oblique striatis. —  Demerara et Antill. 
(Sow. l. 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 peritreme 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 559; length 0,66, greatest breadth 0,5, least 
breadth 0,4 inch. (Adams l. c.) 
