39 CYCLOTUS. &. 
mis, omnes anfractus exhibens. — Opere. caleareum, multi- 
spiratum, intus membrana indutum, concaviusculum, extus carina 
elevata spirali subhorizontali munitum. — Diam. maj. 18, min. 
15, axis 9'/, mill. (B.) 
Cyclostoma aratum  Bens. in Ann. and Mag. 1851. New ser. VIII. 
Cyclotus aratus Pfr. Consp. N. 27. 
Habitat in Indiae orientalis provincia .,Northern Circars? 
(Jerdon). 
55 99. €. orbellus NS. amarck. 
T. late umbilicata, subdiscoidea, tenuis, liris spiralibus 
acutis, superne distantibus, basi confertioribus, obsoletioribus 
sculpta, diaphana, pallide fulvida vel cinerea; spira plana, 
vertice prominente, papillato; sutura late canaliculata; anfr. 
4'/, convexiusculi, ultimus teres, antice deflexus; apertura 
perobliqua, subcireularis; perist. simplex, acutum, marginibus 
approximatis, dextro expansiusculo, crenulato, basali reflexo. — 
Operc.? — Diam. maj. 14, min. 11, alt. 5'/, mill. Ap. 5'/, 
mill. longa. (Coll. Nr. 16.) 
Cyclostoma orbella Lam. Hist. VI. p. 148, N. 23. Ed. Desh. VIII. p. 
36029N.5293*) : 
— — . Deless. Recueil t. 29. f. 13. 
— -— 1089705 Lhes. N..7. p. 989. $ 29. 1-05 6 7: 2) 
— — | Chenu llustr. conch. Livr. 73. t. 1. f. 13. 
— — . Chemn. ed. II. Cycl. N. 154. p. 145. t. 20. f. 4—6. 
— variabile Féruss. Mus. (teste Mus. Cummg.) 
— Lamarkü Petit in Journ. Conch. I. p. 41. 
Cyclophorus? orbellus Pfr. in Zeitschr. f. Malak. 1847. p. 108. 
Cyclotus? orbellus Gray Catal. Cycloph. p. 9. N. 21. 
— — Pfr. Consp. N. 28. 
p? Spira paulo elatiore, liris basalibus distinctioribus; operculo testaceo, 
albo, arctispiro, plano. 
Cyclostoma orbella var.? Chemn. ed. II. Cycl. t. 41. f. 26. 27. 
Habitat in Madagascar (C. variabile Fer.) ; var. 8? in insula 
Guadeloupe (teste Mus. Cuming.). 
*) T. orbieulari, superne planulata, subtus profunde umbilicata, sca- 
briuscula, cinerea; anfractibus longitudinaliter striatis: striis prominentibus ; 
Spirae apice subinammillari. — Diam. eur amiet es) 
**) T. suborbiculari, subdiscoidea, tenui, apice obtuso, paululum levato, 
submamillari; anfr. 4, superne spiraliter striatis, striis prominentibus, infra 
leviter striatis ; vinbilieb patulo; apertura circulari, peritremate tenui, sub- 
reflexo. (Sow. l. e.) 
