48 PTEROCYCLOS $&.3. 
82 ii. 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'/, convexiusculh,, 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. 11'/, alt. 5 mill. (Mus. Benson.) 
Spiraculum parvum Pears. iu 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. 1I. Cyclost. t. 31. f. 12—14. 
Cyclostoma spiraculum var. Sow. Thes t. 31. f. 273? 
Habitat ,Khasya Hills* Indiae (Benson). 
83 12. Pt. Cumingi Pfr. 
T. latissime umbilicata, solida, striatula, nitüda, 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 tumefaectus; apertura parum obli- 
qua, subceireularis, intus margaritacea;  perist. subsimplex, 
album, incrassatum , reflexum, superne sulco triangulari sub- 
interruptum, in linguam inflexam, tenuiusculam productum. — 
Opere. extus conieum, 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, Mal. 
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 Pf. 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. l. c.) 
