306 CATALOGUE OF PHANEROPNEUMONA. 
Cyclostoma striata, Quoy 5 Gaim. Voy. Astrol. Zool. ii. p. 186, 
t. 12, f. 27-30. 
Truncatella Quoyi, Pfr. in Z. f. M. 1846, p. 187. 
Acicula striata, Gray, Catal. Cycloph. p. 68, 0.3; Pfr. Pneum. 
Mon. p. 6. 
Hab. The island of Vanikoro. 
II. GEOMELANIA, Pfr. 
Animal like Acicula (A. Adams, in Proc. Z. S. 1849, p. 169). 
Operculum membranaceous, pellucid, ovate of a few rapidly- 
enlarging whorls. Shell imperforate, turreted ; aperture entire, 
effused ; peristome simple, expanded ; the margins joined, the 
basal produced into a more or less developed tongue-shaped 
appendix. , 
Geomelania, Pfr. in Proc. Zool. Soc. 1845, p.45; Z. f. M. 1847, 
p- 111, 1849, p. 115; Je. Cyclost. p. 213; Adams, Contr. to Conch. 
p. 17; Gray, Catal. Cycl. p. 68; Pfr. Mon. p. 7. 
Ses 
1. GEOMELANIA FORTIS. 
Shell elongate-conic, whitish, with, on each whorl, about thirty- 
six rather slender transverse arcuated ribs; spire with recti- 
linear outlines ; apex truncate, with the loss of about 8 whorls; 
whorls remaining 7, moderately convex, with a well-impressed 
suture ; aperture ovate, widely and deeply effuse ; labrum well 
expanded and reflected, with the linguiform part at the anterior 
extremity, excessively produced obliquely and downwards, 
rather narrow, acute; labium well thickened, slightly separated 
from the penultimate whorl. Length 0.6, greatest breadth 0.18, 
least br. 0.15 inch. (Adams.) 
Geomelania fortis, Adams, Contrib. to Conch. n. 6, p. 94; Pfr. 
Pneum. Mon. p. 8. 
Hab. Jamaica. 
2, GEOMELANIA JAMAICENSIS. B. M. 
Shell turreted, truncate, rather solid, scarcely shining, white, 
sculptured with rather crowded arcuate ribs; whorls remaining 
6-7, moderately convex, the last one rather angulated beneath, 
forming nearly one-sixth of the whole length ; aperture nearly 
perpendicular, ovate ; peristome continuous, with the margins 
joined above into an angle; right and basal margin thickened 
internally and somewhat reflected; columellar margin ap- 
pressed; tongue-shaped appendix somewhat twisted, sharp, 
produced. Length 12-14, breadth 34 mill. 
