48 
PTEROCYCLOS §. 3. 
82 11. Pt. parvus Pearson. 
T. late umbilicata, depressa, solidula, striatula, corneo- 
lutescens, fascia ramosa castanea ad peripheriam strigisque 
angulatis superne variegata; spira subplana, medio vix pro- 
minula; anfr. 4'/ a convexiusculi, ultimus teres, antice descen- 
dens, basi pallidior ; apertura obliqua, circularis ; perist. duplex : 
internum breviter porrectum, superne sinu circulari emargina- 
tum, externum latiusculum, reflexum, album, supra sinum an- 
gulatim recedens, ascendens, cucullatim dilatatum. — Operc.? 
— Diam. maj. 14, min. ll'/a? alt. 5 mill. (Mus. Benson.) 
Spiraculum pai'vum Pears, in Journ. As. Soc. II. 1833. p 392. t. 20. 
Pterocyclos parvus Bens, in Journ. As. Sos V. 1836. p. 357. 
— — Bens, in Ann. and Mag. 2d. ser. I p 346. 
— — Pfr. in Zeitschr. f. Malak. 1851. p. 5. Consp. N. 54. 
— — Chemn. ed. II. Cyclost. t. 31. f. 12—14. 
Cyclostoma spiraculum var. Sow. Thes t. 31. f. 273? 
Habitat „Khasya Hills“ Indiae (Benson). 
83 12. Pt. Cuming! Pfr. 
T. latissime umbilicata, solida, striatula, nitida, fulvo- 
lutea, strigis castaneis fulguratis, bifasciatim latioribus et satu- 
ratioribus picta; spira plana; anfr. 5 convexi, ultimus teres, 
antice juxta penultimum in prominentiam elongatam, forni- 
catam, sulco circumscriptam tumefactus; apertura parum obli- 
qua, subcircularis , intus margaritacea ; perist. subsimplex, 
album, incrassatum, reflexum, superne sulco triangulari sub- 
interruptum, in linguam inflexam, tenuiusculam productum. — 
Operc. extus conicum, nucleo centrali parvo, obtuso, anfracti- 
bus lamella spirali elevata signatis. — Diam. maj. 32, min. 
28, alt. 6 mill. (Mus. Cuming.) 
Pterocyclos Cumingi Pfr. in Proc. Zool. Soc. 1851 et Zeitschr. f. Mai. 
1851. p. 5. 
— — Chemn. ed. II. Cyclost. t. 31. f. 6— 8. Consp. N. 55. 
Habitat in insula Ceylon. 
at its full growth, being allied in the characters of the aperture to Pt. rupe- 
stris , but differing from the smallest varieties of that shell not only in size 
and in the form of the umbilicus , but also in the less curvature of the in- 
cision under the wing, which is moreover less expanded, and does not touch 
nor cover auy part of the preceding whorl. (Bens. 1. c.) 
