176 CATALOGUE OF PHANEROPNEUMONA. 
Cyclostoma crenulatum, Gray, MSS. in Sow. Thes. n. 163, p. 148, 
t.28, £174, 175. 
Cyclostoma Adamsi, Pfr. in Z. f. MW. 1846, p. 43; Jc. n. 40, p. 48, 
t. 6, f. 20, 21, t. 46, f 29, 30. 
Cistula columna var., Gray, Cat. Cycl. p. 57. 
Tudora? Adamsi, Pfr. Consp. n. 367; Pneum. Mon. p. 251. 
Hab. Jamaica. 
This species differs from C. columna by the shape of the mouth, 
the left margin of which is not receding, by the obsolete inner 
peristome, and the outer being scarcely dilated, not auriculated 
above and on the left side. 
14. Tupora 2 CHEMNITZII. B. M. 
Shell perforate, ovate-conic, solid, truncate, smooth, whitish, 
marked with a single broad or four interrupted fuscous bands ; 
whorls remaining 4—5, convex, the last one grooved with several 
spiral furrows round the narrow perforation; aperture obliquely 
ovate; peristome indistinctly doubled; inner edge thin, not 
prominent, outer edge shortly expanded, continuous, with the 
margins joined angularly, with a folded auricula above and on 
the left side. Operculum (fide Sow.) shelly, with few striated 
whorls. Length 14, breadth 8 mill. 
Turbo Chemnitzii, Gray, in Wood, Ind. Suppl. t. 6, f. 6. 
Cyclostoma Chemnitzil, Gray, in Wood Suppl. p. 36; Sow. The:. 
n. 140, p. 141, t. 28, f.155, 156; Pfr. Ic. n.88, p. 92, t. 12, f. 32, 33. 
Choanopoma interruptum var. min., Gray, Cat. Cycl. p. 54. 
Tudora ? Chemnitzii, Pfr. Consp. n. 368; Prnewm. Mon. p. 251. 
Hab. South-Africa (Sowerby). 
§ 3. Peristome double. 
15. TupoRA NOBILIS. 
Shell perforate, ovate-turreted, closely sculptured with longitu- 
dinal thread-like folds, little shining, brownish-violaceous ; spire 
elongate-conic, not truncate, with the apex rather blunt; suture 
beset with very crowded white crenulations; whorls 7, mode- 
rately convex, the last one shortly detached anteriorly, con- 
centrically striated beneath; aperture perpendicular, irregularly 
ovate, fuscous within; peristome white, double; inner edge 
shortly produced, slightly expanded, with the margins joined 
angularly ; left margin slightly arcuated; outer edge shortly 
expanded all round. Operculum grooved deeply and obliquely. 
Length 32, breadth 15 mill. 
Cyclostoma nobile, Pfr. in Proc. Z. S. 1851; Jc. n. 390, t. 47, 
f. 27, 28. 
Tudora nobilis, Pfr. Preum. Monogr. p. 254. 
Hab, Haiti (My. Sallé). 
