82 CATALOGUE OF PHANEROPNEUMONA. 
24, LEPTOPOMA ACUMINATUM. B. M. 
Shell perforate, conical, turreted, rather thin, obliquely slightly 
striate, diaphanous, shining, whitish; spire elongated, with 
the apex acuminated, brownish ; whorls 63, moderately convex, 
last rounded, keeled below the middle ; aperture very oblique, 
truncatedly ovate; peristome sharp, expanded, with distant 
margins ; columellar margin rather dilated and slightly reflected 
above, rather angularly thickened at its lower extremity. 
Height 13, greatest breadth 12, least br. 10 mill. 
Cyclostoma acuminatum, Sow. in Proc. Z. S. 1848, p. 65; Thes. 
n. 133, p. 138, t. 30, f. 235; Pfr. Ic. n. 104, p. 108, t. 13, f. 11, 12. 
Leptopoma acuminatum, Pfr. in Z. f. Wf. 1847, p. 108, n. 1; 
Consp. n. 169; Gray, Cat. Cycl. p. 27, n. 18; Pfr. Pneum. Mon. 
Dil 16. 
Hab. Island of Luzon, 8S. Juan (H. Cuming). 
25. LEPTOPOMA ELATUM. 
Shell conical, rather thin, obliquely striate, crossed, under a lens, 
with distant raised spiral lines, scarcely diaphanous, whitish ; 
spire conical, rather pointed ; whorls 54, somewhat convex, the 
last one more rounded, subacutely keeled, more closely de- 
cussated beneath ; umbilicus extremely narrow, not pervious ; 
aperture diagonal, truncatedly ovate ; peristome simple, with 
the margins distant, equally broad, angularly expanded ; 
columellar margin scarcely narrower. Height 103, greatest 
breadth 112, least br. 10 mill. 
Cyclostoma elatum, Pfr. in Proc. Z. 8, 1851; Jc. n. 226, a. t. 32, 
a ae eg 
Leptopoma elatum, Pfr. Consp. nu. 170, p. 58; Pneum. Mon. p. 117. 
Hiab. Ceylon. 
§. 5. Peristome simple, straight. 
26. LEPTOPOMA TENEBRICOSUM. 
Shell narrowly umbilicate, globose-conical, slightly striate, thin, 
rather pellucid, brownish, varied with darker stripes and clouds; 
spire turbinate, rather blunt; whorls 4, very convex, last 
rounded, with a narrow yellow band on the periphery ; aperture 
somewhat oblique, nearly circular, blueish, shining inside; peri- 
stome simple, straight, interrupted, with the columellar margin 
penty reflected. Height 12, greatest breadth 14, least br. 
12 mill. 
Cyclostoma tenebricosum, A. Adams & feeve, Voy. Samarang, Moll. 
p. 57, t. 14, £. 6; Pfr. Ic. n. 232, t. 33, f. 12, 13. 
Leptopoma tenebricosum, Pfr. Consp. n. 171; Pneum. Mon. p. 117. 
Hab. Borneo, Balambangan. 
