108 CATALOGUE OF PHANEROPNEUMONA. 
Cyclostoma subasperum, Sow. Thes. n. 143, p. 142, t. 28, f. 159. 
Cistula decussata, Humphr. MSS. 
Licina evoluta, Gray, Cat. Cycl. p. 61, n.2; Pfr. Consp. n. 221; 
Pneum. Mon. p. 152. 
Hab. East India ? 
4, Licina? REEVEANA. 
Shell ovate-oblong, truncate, solid, regularly decussated by raised 
spiral and longitudinal lines, violaceous or flesh-coloured-grayish, 
suture white-bordered, very closely denticulated; whorls re- 
maining 44, convex, the last one more distinctly spirally fur- 
rowed beneath; umbilicus narrow; aperture perpendicular, 
ovate; peristome double; inner edge shortly expanded, outer 
edge dilated and reflected, angularly produced above, with the 
columellar margin very broad. Length 31, breadth 16 mill. 
Cyclostoma decussatum, Sow. Thes. Suppl. n. 193, p. 165*, t. 31, 
A. f. 300, 301. Not Lam. 
Cyclostoma Reeveanum, Pfr. Jc. n. 341, t. 43, f. 4, 5. 
Licina? Reeveana, Pfr. Consp. n. 222; Pneum. Mon. p. 153. 
Hab. West Indies. 
XVII. CHOANOPOMA. 
Operculum calcareous, nearly circular, with gradually-enlarging 
whorls, terminating externally in more or less prominent thin 
lamella, with a subeccentrical nucleus. Shell globose-turbinate 
or turreted, often truncate. Aperture rather oval or roundish. 
Peristome usually double, with the outer edge angularly ex- 
panded. 
Licina, 8 Gray, Syn. Brit. Mus. 1842, p. 91; Proc. Z. 8. 1847, 
pas. 
Choanopoma, Pfr. in Z. f. M. 1847, p. 47-107; 1851, p. 158; 
Gray, Cat. Cycl. p. 48 (part); Pfr. Consp. p. 25; Pneum. Mon. 
p- 154. 
Cyclostoma sp., Awcét. 
A. Oblong or ovate-conic §. 1 a ee 
B. Globose-conic 
1. With the outer edge of peristome waved § 2 , 6-14. 
2. With the outer edge of peristome flat. § 3. ,, 15-17. 
C. Depressed : : : : : -  § 4) aie 
§ 1. Shell oblong or ovate-conice. 
1. CHOANOPOMA MAJUSCULUM. 
Shell subperforate, oblong, truncate, solid, minutely trellised by 
raised longitudinal and spiral lines, violaceous-brown; suture 
