CYCLOTUS $. 3. 39 
Aperostoma plebejum Pfr. in Zeitschr. f. Mal. 1847. p. 104. 
Cyclotus plebejus Gray Catal. Cycloph. p. 7. N. 7. 
— — . Pfr. Consp. N. 41. 
Habitat in provincia Laguna insulae Luzon. 
49. €. exiguus Sowerby. 1 68 
T. subdiscoidea, spira elevatiuscula; anfr. 4 rotundati, 
albi, laeves; sutura profunde impressa; apertura circularis; 
peritrema marginatum; umbilicus magnus. (Sow.) — Diam. 
10'/,, alt. 6 mill. (Ex ic.) 
Cyclostoma exiguum Som. 'Thes. N. 63. p. 112. t 25, f. 92. 
— —.  Chemn. ed. II. Cycl. N. 216. p. 192. t. 28. f. 24. 
(Ex Sow.) 
ZAperostoma exiguum | Pfr. in Zeitschr. f. Mal. 1847. p. 104. 
Cyclotus exiguus. Gray Catal, Cycloph. p. 9. N. 17. 
- — . Pfr. Consp. N. 42. 
Habitat . . .? 
* 
43. €. variegatus Swains. 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'/, convexiuseuli, ultimus teres; apertura subobliqua, 
circularis; perist. duplex, internum breve, continuum, exter- 
num subexpansum, superne dilatatum, ad anfractum penultimum 
aurieulatum. — Operc. subimmersum, crassum, arctispirum, 
extus medio concavum. — Diam. maj. 20'/,, min. 17, alt. 6'/, 
mill Ap. intus 7 mill. longa. (Coll. Nr. 24.) 
Cyclostoma planorbulum Sow. Genera of shells. Cyclost. f£. 1, Nee Lam. 
— — Som. Thes. N. 58. p. 110. t. 25 f. 85. *) 
— — Chemn. ed. IL, Cycl. N. 174. p. 161. t. 22, 
f. 6—16. 
— cornu venatorium Pelit in Journ, Conch. I. p. 43. 
*) T. discoidea, spira depressa, plana, colore pallido, castaneo-varie- 
gata; anfr. 5 rotundatis, gradatim majoribus, laevibus; sutura distincta, pro- 
fundiuscula; apertura fere circulari, peritremate inerassato, superne et extus 
reflexo, ultimum versus anfractum desinente, fornicato; umbilico patulo. 
(Sow. l. c.) 
