CYCLOTUS §. 3. 
39 
Aperostoma plcbejum Pfr. in Zeitschr. f. Mai. 1847. p. 104. 
Cyclolus plebejus Gray Catal. Cycloph. p. 7. N. 7. 
— — Pfr. Consp. N. 41. 
Habitat in provincia Laguna insulae Luzon. 
42. C. exlguus Sowerby. *j- 68 
T. subdiscoidea, spira elevatiuscula ; anfr. 4 rotundati, 
albi, laeves; sutura profunde impressa; apertura cireularis; 
peritrema marginatum; umbilicus magnus. (Sow.) — Diam. 
10 r / 2 » alt. 6 mill. (Ex ic.) 
Cyclostoma exiguum Sow. Thes. N. 63. p. 112. t 25. f. 92. 
— — Chemn ed. 33. Cycl. N. 216. p. 192. t. 28. f. 24. 
(Ex Sow.) 
Aperostoma exiguum Pfr. in Zeitschr. f. Mai. 1847. p. 104. 
Cyclotus exiguus Gray Catal. Cycloph. p. 9. N. 17. 
— — Pfr. Consp. N. 42. 
Habitat . . .? 
* * 
43. C. variegatus Swanns* 69 
T. latissime umbilicata, discoidea, solidula, subtiliter stria- 
tula, pallide fulvescens, unicolor vel castaneo eleganter et un- 
datim strigata vel tessellata, interdum infra peripheriam uni- 
fasciata ; spira plana, vertice haud prominulo, saepe nigricante ; 
anfr. 4‘/ 2 convexiusculi , ultimus teres; apertura subobliqua, 
cireularis; perist. duplex, internum breve, continuum, exter- 
num subexpansum, superne dilatatum, ad anfractum penultimum 
auriculatum. — Operc. subimmersum, crassum, arctispirum, 
extus medio concavum. — Diam. maj. 20 l / 2 , min. 17, alt. 6y a 
mill. Ap. intus 7 mill, longa. (Coll. Nr. 24.) 
Cyclostoma planorbulum Sow. Genera of shells. Cyclost. f. 1, Nec Lam. 
— — Sow. Thes. N. 58. p. 110. t. 25 f. 85.*) 
— — Chemn. ed. II. Cycl. N. 174. p. 161. t. 22. 
f. 6—16. 
— cornu venatorium Petit in Journ. Conch. I. p. 43. 
*) T. discoidea , spira depressa , plana , colore pallido , eastaneo-varie- 
gata; anfr. 5 rotundatis, gradatim majoribus, laevibus; sutura distincta, pro- 
fundiuscula; apertura fere circulari, peritremate incrassato, superne et extus 
reflexo , ultimum versus anfractum desinente , fornicato ; umbilico patulo. 
(Sow. 1. c.) 
