238 CATALOGUE OF PHANEROPNEUMONA. 
Helicina Sloanei, D’Orb. Moll. Cub. i. p. 248, t. 20, f. 4-6; Sow. 
Thea Az op: 10, t. 3, £102: 
Trochatella Sloanei, Pfr. Pnewm. Mon. p. 331. 
Hab. Cuba, Cerro de Cuzco (Délatre, Zanier). 
§ 3. Shell slightly keeled. 
6. TRocHATELLA PETITIANA. 
Shell globose-conic, thin, sculptured with close-set, blunt, con- 
centric ridges, diaphanous, pale yellowish; spire conic, pointed ; 
whorls 63, rather flattened, last angulated obsoletely, more 
convex on both sides; aperture oblique, large, nearly semi- 
circular, yellow within; columella short, simple, slightly con- 
cave; peristome thin, broadly expanded, with the margins 
joined by thin callus, upper and columellar margin wing-like, 
dilated. Operculum shelly, concave in the middle, thin. 
Height 8, greatest breadth 123, least br. 11 mill. 
Helicina Petitiana, Orb. Moll. Cub. i. p. 247, t. 20, f.1-3; Pfr. Ie. 
n. 53, p. 43, t. 7, f. 30-32. 
Trochatella Petitiana, Petit, in Journ. Conch. 1851, i. p. 85; Pfr. 
Preum. Mon. p. 331. 
Hab. Jagua, Cuba (D’Orbigny, Poey). 
7. TROCHATELLA CONICA. 
Shell conic, acuminated, rather convex beneath, closely striated 
spirally, pale reddish-brown, flesh-coloured or whitish ; whorls 6, 
rather flat, sometimes prominent, last about as long as the spire, 
slightly angulated on the periphery; aperture rather perpen- 
dicular, entire, ovate-triangular; columella simple, slightly 
dilated backwards; peristome white, sharp, spreading broadly 
and rectangularly. Operculum thin. Height 4!, greatest 
breadth, 52, least br. 43 mill. 
Helicina conica. Pfr. in Wiegm. Arch. f. Naturg. 1839, i. p. 355 ; 
Sow. Thes. n. 45, p. 9, t. 3, f. 101. 
Helicina elegans, Orb. Moll. Cub. i. p. 250, t. 20, f. 13-15. 
Trochatella conica, Pfr. in Z. f. M. 1848, p. 82; Jc. n. 6, p. 7, t. 5, 
f. 9-11; Pneum. Mon. p. 331. 
Hab. Cuba ; frequent near Matanzas. 
8. TROCHATELLA ELEGANTULA. 
Shell conic, rather thin, slightly carinated, sculptured above with 
rather distant elevated ridges, on the lower side with more 
crowded spiral striz, reddish or yellow; spire conic, with the 
apex pointed; whorls 6, rather flat, the last more convex, some- 
what flattened beneath ; aperture diagonal, subtriangular ; colu- 
