PTEROCYCLOS $. 3. 49 
13. Pt. bilabiüatus Hemnsorm. 84 
T. late umbilieata, depressa, fere discoidea, striatula, 
albida, strigis angulosis castaneis picta; spira vix elevata, apice 
obtusiusculo nigricans; anfr. 5 — 5'/, convexiusculi, sensim 
accrescentes, ultimus teres, medio castaneo-fasciatus; apertura 
obliqua, circularis; perist. duplex: internum subcontinuum, 
rectum, superne profunde incisum, externum juxta anfractum 
penultimum cucullatim inflatum, margine dextro et basali pro- 
funde undulato-erispis. — Opere. (ex Sow.) cireulare, spirale, 
intus concavum, extus convexum, lamellosum. — Diam. maj. 
20, min. 17, alt. 8'/, mill. Ap. intus 6 mill. diam. (Mus. 
Cuming.) 
Pterociyclos bilabiatus Bens. 1834 in Zool. Journ. V. p. 462. (absque 
deseript.) - 
- — Bens. 1836. Journ. As. Soc. V. p. 358. 
— — Pfr. in Zeitschr. f. Malak. 1847. p. 111. 1851. p. 4, 
Consp. N. 56. 
— — Chemn. ed. II. Cycl. p. 193; t. 24. f. 11 — 14. 
— — Gray Catal. Cycloph p. 13. N. 6. 
Cyclostoma Lilabiatum Som. 'Thes. N. 57 p. 110. t 25. f. 81. 82. *) 
I 
— -— Petit in Journ. Conch. 1850 p 43. 
Habitat Salem prope Madras (Heath, Sowerby). 
(4. P*'t. Blandi Bensomn. T 85 
T. latissime umbilicata, orbiculato-depressa, albida, strigis 
undatis radiatis fusco-aurantiis fascilaque unica saturatiore ad 
peripheriam ornata; anfr. 4'/, rapide accrescentes, ultimus 
antice subito valde alatim dilatatus; apertura obliqua; perist. 
subduplex: internum inerassatum, superne liberum, sinuatum, 
externum superne valde expansum, ala soluta antice angulata, 
descendente, supra anfractum penultimum projecta, postice 
sinum exhibente munitum. — Opere.? — Diam. 1^ (DBland.) 
— Diam. maj. 29, min. 23 mill. ex ic. (Bens.) 
Pterocyclos Blandi Bens. in Ann. and Mag. VIII 1851. Aug. t. 5. f. 1. 
-— — . Pfr. Consp. N. 58. 
Habitat ad Pulo Susson insulam prope Pulo Penang jacen- 
tem (Bland). 
*) T. discoidea, spira. depressa, fere plana, colore pallido, castaneo- 
undulata; anfr, 5 rotundatis, gradatim majoribus, laevibus; sutura distincta, 
profundiuseula; apertura fere circulari; peritremate duplici, interno simplici, 
superne emarginato, externo extus undulato, sinuoso, superne in tuberculum 
fornieatum desinente; umbilico patulo, anfractibus distinetis. (Sow. 1l. c.) 
4 
