32 
CYCLOTUS §. 2. 
mis, omnes anfractus exhibens. — Operc. calcareum, multi- 
spiratum, intus membrana indutum, concaviusculum, extus carina 
elevata spirali subhorizontali munitum. — Diam. maj. 18, min. 
15, axis 9'/. 2 mill. (B.) 
Cyclostoma aratum Bens, in Ann. and Mag. 1851. New ser. VIII. 
Cyclotus aratus Pfr. Consp. N. 27. 
Habitat in Incliae orientalis provincia „Northern Circars“ 
(Jerdon). 
55 29. C. orbellus l^aiiiareU. 
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 V 2 convexiusculi , ultimus teres, antice deflexus; apertura 
perobliqua, subcircularis ; perist. simplex, acutum, marginibus 
approximate, dextro expansiusculo, crenulato, basali reflexo. — 
Operc.? — Diam. maj. 14, min. 11, alt. 5 1 / 2 mill. Ap. 5‘/ 2 
mill, longa. (Coll. Nr. 16.) 
Cyclostoma orbella Lam. Hist. VI. p. 148. N. 23. Ed. Desh. VIII. p. 
360. N. 22.*) 
— — Deless. Recueil t. 29. f. 13. 
-- — Sow. Thes. N. 7. p. 93. t. 23. f. 6*. 6**.**) 
— — Chenu Illustr. conch. Livr. 73. t. 1. f. 13. 
— — Chemn. ed. II. Cycl. N. 154. p. 145. t. 20. f. 4 — 6. 
— variabile Feruss. Mus. (teste Mus. Cuming.) 
— Lamarkii 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. 
,3? Spira paulo elatiore, liris basalibus distinctioribus ; operculo testaceo, 
albo, arctispiro, piano. 
Cyclostoma orbella var.? Chemn. ed. II. Cycl. t. 41. f. 26. 27. 
Habitat in Madagascar {C. variabile Fer.} ; var. /?? in insula 
Guadeloupe (teste Mus. Cuming.). 
*) T. orbiculari , superne planulata, subtus profunde umbilicata, sca- 
briuscula. cinerea ; anfractibus longitudinaliter striatis : striis prommentibus ; 
spirae apice submammillari. — Diam. 6'". (Lam. 1. c.) 
**) T. suborbiculari, subdiscoidea, tenui, apice obtuso, paululum levato, 
submamillari ; anfr. 4, superne spiraliter striatis , striis prominentibus , infra 
leviter striatis ; umbilico patulo ; apertura circulari, peritremate tenui , sub- 
reflexo. (Sow. 1. c.) 
