CYCLOSTOMUS $. 10. 239 
ovalis; perist. duplieatum : internum rectum, externum undique 
subaequaliter patens. — Operc. terminale, testaceum, nucleo 
parum excentrico, anfr. 4 oblique confertim sulcatis, margine 
subelevato. — Long. 10— 11, diam. 4'/,—5 mill. Ap. 3 - 3*7, 
mill. longa, 2'/,--23/, lata. (Coll. Nr. 165.) 
Cyclostoma rugulosum Pfr. in Wiegm. Arch. f. Nat. 1839. I. p. 356. 
-— — Chemn. ed.. II. N. 120. p. 117. t. 14. f. 9—11. 
£M fO EX 
E clathratum Gould in Bost. Journ. IV. 1. 1842. (In involucro.) 
-— verecundum Poey Memorias I? 
Cistula rugulosa Gray Catal. Cycloph. p. 59. N. 10. 
Cyclostomus rugulosus Pfr. Consp. N. 349. 
Habitat in insula Cuba. 
80. €. Wilkinsoni Adams. 393 
T. subperforata, cylindraceo-turrita, truncata, tenuis, lon- 
gitudinaliter confertim. costata, diaphana, albida, rufo seriatim 
et obsolete maculata; sutura lamelloso- dentata; anfr. superst. 
4 convexi, lente accrescentes, ultimus disjunctus, descendens, 
dorso carinatus, latere columellae spiraliter sulcatus; apertura 
axi subparallela, ovalis; perist. duplex : internum vix porrectum, 
externum undique breviter reflexum. — Opere. fere C. rugu- 
losi. — Long. 8, diam. 3'/, mill. Ap. 2 mill. longa. (Coll. 
Nr. 160.) 
Cyclostoma Wilkinsoniài Adams Contrib. to Conch. N. 1. p. 6. *) 
— -— Chemn. ed. IL. N. 376. t. 46. f. 17—19. 
— Vilkinsoni 44dams Catal. Apr. 1851. 
Cyclostomus | Wilkinson Pfr. Consp. N. 350. 
5. Testa minore, unicolore, anfract. 3'/,, ultimo minus disjuncto; long. 6: 
diam. 3 mill. (Mus. Cuming.) 
Cyclostoma modestum 4dams Contrib. to Conch. N 1. p. 6. **) 
Habitat in insula Jamaica. 
*) Shell small, subcylindrical; whitish, with a few small distant pale 
brown spots in a spiral series;. with not very closely set sharp transverse 
raised lines; spire with sligthly convex outlines; apex truncate with the loss 
of three whorls, of which /Ae second and third are seen in the young shell 
to be entirely and widely detached : four whorls remaining, very convex, 
with a very deep suture; last whorl widely detached from penult whorl near 
the aperture, acutely angular above; aperture suborbicular, quite angular 
above; inner peritreme moderately produced; outer peritreme rather small, 
concentrically striated, reflected a little back of the plane of the aperture, 
above produced into an angle, with two or three small brown spots; umbi- 
lieus very small, but extending through and spreading near the apex. Mean 
divergence about 179; length 0,35; greatest breadth 0,16; least breadih 0,12 
inch. (Adams 1. c.) 
**) Shell small, elongate; whitish; with thin raised laminae, which are 
