CYCLOTUS §. 1. 
23 
Cyclostoma semislriatum Chcmn. ed. II. Cycl. N. 156. p. 147. t. 20. 
f. 10-12. 
— fasciatum Halt mss. in Mus. Brit, 
— album Hull. mss. in Mus. Brit. 
Aperosloma semistriatum Pfr. in Zeitschr. f. Mai. 1847. p. 104. 
Cyclotus semistrialus Gray Catal, Cycloph, p. 10. N. 26. 
— — Pfr. Consp. N. 10. 
Habitat in India orientali, circa Poonah et Neemuch; in insula 
Ceylon ? 
If €?. pr«>m2milugf Ferugsac* 37 
T. late umbilicata, depressa, subdiscoidea, tennis, ruguloso- 
striata, opaca, alba; spira breviter elevata, mucronulata ; anfr. 
4 — 5 convex!, rapide accrescentes, ultimus depressus , antice 
dilatatus, plerumque solutus; apertura vix obliqua, subcircula- 
ris; perist. rectum, acutum , continuum vel breviter interrup- 
tum, marginibus callo nitido junctis. — Operc. arctissime 
spiratum, marginibus acutis subelevatis. — Diam. maj. 15, 
min. 12, alt. 8 mill. Ap. 6 mill, longa. (Coll. Nr. 8.) 
Cyclostoma prominula Fer. Mus. 
— — Orb. 1837. Voy. Amer. p. 362.*) 
— planorbulum Sow. Conch. Man. ed. II. f. 530? 
— Brasiliense Sow. Spec. Conch. Pt. II. Cyclost. f. 8. 
— Sow. in Zool. of Beech, voy. p. 147. t. 38. 
f. 32. **) 
— — Sow. in Proc. Zool. Soc. 1843. p. 29. 
— — Sow. Thes. N. 4. p. 92. t. 23. f. 7. 
— — Chcmn. ed. II. Cycl. N. 108. p. 108. t. 12. 
f. 13 — 15. 
Aperosloma brasiliense Pfr. in Zeitschr. f. Mai. 1847. p. 104. 
Cyclotus brasiliensis Gray Catal. Cycloph, p. 6. N. 4. 
— — Pfr. Consp. N. 11. 
Habitat in Brasilia, prope Bio Janeiro (Sow.) et in provincia 
Minarum (Orb.). 
* * 
* 
*) T. orbiculato - depressa , transversim costata, albida; spira conica, 
apice obtuso; anfract. 4 convexis , sutura profunda; apertura rotunda. — 
Alt. 8 mill., diam. 13 mill. (Orb. 1 c.) 
**) T. late umbilicata, orbiculari , depressiuscula , tenui , alba, opaca; 
anfr. 4 — 5 transverse striatis, striis acutis, confertis ; sutura profunda; aper- 
tura circulari; peristomate tenui, acuto; operculo crasso, testaceo , duplice, 
intus glabro, extus subtilissime spirato, (Sow. 1. c.) 
