GEOMELANIA. 
7 
subovalis ; perist. crassum , non reflexum ; operculum ovale, 
paucispirum, tenue, pallidum. — Long. 3 lin. (Q. et G.) 
Cyclostoma striata Quoy ct Gaim. Voy. Astrol. II. p. 186. t. 12. I. 27 30. 
Truncatclla Quoyi Pfr. in Zeitschr. f. Mai. 1846. p. 187. 
Acicula striata Gray Catal. Cycl. p. 68. N. 3. 
Habitat in insula Vanikoro. 
II. Geomelania Pfr. 
Animal sicut Aciculae (teste Gray). — Operculum mem- 
branaceum , pellucidum , ovale , anfractibus paucis rapidissime 
accrescentibus , nucleo basali. — Testa imperforata, turrita ; 
apertura integra, effusa; peristoma simplex, expansum, mar- 
ginibus junctis, basali in appendicem sublinguaeformem producto. 
Geomelania Pfr. in Proc. Zool. Soc. 1845. p. 45; Z. f. M. 1847. p. Ill: 
1849. p. 115; Chemn. ed. II. Cycl. p. 213. 
— Adams Contrib. to Conch. N. 2. p. 17. 
— Gray Catal. Cycloph. p. 68. 
1. O. Jamaieensis Pfr. ( 
T. turrita, truncata, solidula, arcuatim et subconferte cos- 
tata, parum nitens, alba; anfr. 6 — 7 convexiusculi , ultimus 
basi subangulatus, fere */ 6 iongitudinis formans ; apertura sub- 
verticalis , ovalis : perist. continuum , marginibus superne 
angulatim junctis, dextro et basali intus incrassatis, subreflexis, 
columellari appresso; appendix linguaeformis acuta, porrecta. 
— Long. 12 — 14, diam. 3‘/ 2 mill. (Coll. Nr. 4.) 
Geomelania Jamaicensis Pfr. in Proc. Zool. Soc. 1845. p. 45. 
— — Chemn. ed. II. Cycl. p. 214. t. 30. f. 19. 20. 
— -- Adams Contrib. to Conch. N. 2. p. 18. *). 
— — Gray Cat. Cycloph. p. 68. 
Habitat in insula Jamaica. 
*) Shell conic -cylindrical, whitish; densely sculptured with strong trans- 
verse somewhat angular ribs , which become obsolete only at the anterior 
extremity of the last whorl ; spire with rectilinear outlines ; apex truncate ; 
nearly 7 whorls remaining, rather convex, with a well impressed suture; 
aperture ovate, widely and deeply effuse; labrum much thickened, reflected, 
very much produced in the lower part; labium rather thick, separated by a 
slight groove from the penultimate whorl, separated above from the labrum 
by a small sinus. — Mean diverg. 16°. (Adams 1. c.) 
