CHOANOPOMA &. 2. 163 
Choanopoma spinulosum Pfr. Consp. N. 234. 
Habitat in insula Jamaica. 
Obs. Cl. Auct. in Catal. moll. Jamaie. Apr. 1851 ad C. lincincllum Lam. 
synonymum laudat: C. spinulosum .4d.? 
13. €h. mite Pfr. 273 
T. umbilicata, turbinato-globosa, breviter truncata, liris 
obtusis spiralibus munita, costulis membranaceis confertissimis 
decussata, unicolor corneo-albida; spira convexa, brevis; anfr. 
superst. 3'/, convexi, ultimus teres, circa umbilicum medio- 
crem, pervium distinctius spiraliter liratus; apertura verticalis, 
circularis; perist. duplex : internum. vix porrectum, externum 
undique aequaliter dilatatum, patens, obsolete undulatum, con- 
centrice striatum, superne subangulatum, ad anfr. penultimum 
subemarginatum. -— Operc.? — Diam. maj. 123, min. 10, 
alt. 9 mill. Ap. intus 5, cum limbo 47'/, mill. longa. (Mus. 
Cuming.) 
Cyclostoma mite (Choanopoma) P/r. in Proc. Zool. Soc. 9 Dec. 1851. 
c —  Chemn. ed. II. N, 332. t. 42. f. 7. 8. 
Choanopoma mite Pfr. Consp. N. 235. p. 59. 
Habitat in. insula Jamaica. 
Obs. Differt ab omnibus praecedentibus superficie minime scabra, limbo 
peristomatis externo aequaliter angusto, vix undulato. 
14. €h.? Pretrei Orbigny. 274 
T. umbilicata, turbinata, tenuis, lamellis longitudinalibus 
distantibus, seriatim spiniferis munita, unicolor alba; spira 
conica, saepe truncatula; anfr. 4—6 convexi, ultimus antice 
solutus, oblique descendens; umbilicus mediocris, pervius, intus 
spirahter lhratus; apertura subeircularis; perist. duplicatum : 
internum acutum, breviter porrectum, externum undulatum, 
horizontaliter anguste expansum. —  Operc.? — Long. 8, 
diam. 9 mill. Ap. 3 mill. diam. (Mus. Cuming.) 
Cyclostoma Pretrei Orbigny Moll. Cub. I. p. 260. t. 22. f. 9—11. *) 
*) T. conica, tenui, diaphana, pellucida, alba, umbilieata, longitudina- 
liter lamellosa, transversim spinosa; spira conica, elevata; anfr. 6 convexis, 
ultimo soluto; apertura rotunda; labro tenui, foliaceo, undulato-crenulato. 
— Long.9 mill. Diam. 6 mill. — Coquille profondément ombiliquée, ornée. 
en long. de lames saillantes espacées et, en travers, de 10— 11 lignes trans- 
versales de pointes épineuses, placées sur les lames. Spire conique, tron- 
quée à son sommet, composée de 6 tours trés-convexes, dont le dernier, 
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