PTEROCYCLOS §. 3. 31 



11. Pl. nauui!9 Beusou* 



T. umbilicata, convexo-subdiscoidea, albida, fascia mediana 

 strigisque undulatis castaneis superne ornata; spira prominula, 

 apice subtili; anfr. 41/2 convexi, ultimus antice subsolutus; 

 umbilicus latus, profundus; apertura obliqua, circularis; perist. 

 duplicatum, marginibus sulco leviter impresso vix discretis, 

 interno superne profunde recteque inciso, externo reflexius- 

 culo, supra sinum alam angustam, fornicatam, antice breviter 

 descendentem, angulatam formante. — Operc. Pf. rupestris. — 

 Diam. maj. 10, min. 8, alt. 5 mill. (Coll. Nr. 40.) 



Plcrocyclos namis Bens. in Ann. and Mag. N. H. 2d. ser. VIII. p. 450. 



— — Clicmn ed. nov. p. 388. t. 49. f. 31—33. 



— — Ppr. Mon. Pneum. p. 47. n. 10. 



— — Gray Cat. Phan. p. 30. 



— — //. et A. Adams Gen. rec. Moll. II. p. 277. 



Habitat in montibus Neilffherries Indiae. 



12. pnrvus Pears. (Ch. ed. nov. p. 233. — Gray 

 Phan. p. 30. — Ad. Gen. p. 277. — Excludatur 

 synon. Cyct. spiracutum var. Sow, Thes. f. 273.) . Mon. p. 48. 



13. Pt. pullatus Beusou. 



T. aperte umbilicata, convexo-depressa, confertim radiato- 

 striatula, nigrescente - castanea , superne strigis luteo-albidis, 

 fulguratis, fasciaque saturata ornata; spira convexa, sutura 

 profunda, apice prominulo; anfr. 4^/2 convexi, ultimus teres, 

 longe descendens ; umbilicus mediocris , profundus, perspecti- 

 vus; apertura vix obliqua, circularis; perist. duplcx : internum 

 breviter porrectum, superne sinu mediocri latiusculo interrup- 

 tum , externum vix expansiusculum, superne alam subrevolu- 

 tam semicucuUatam , antice breviter descendentem obtusam, 

 ab anfractu penultimo distantem efformans. — Operc. intus 

 concavum, extus concaviusculum, scabrum, anfractuum margi- 

 nibus elevatis; margine laterali lato , lamellis acutis spiralibus 

 munito. — Diam. maj. 13, min. ID/2, alt. 6 mill. (Coll. Ben- 

 son.) 



Pterocyclos pullatus Bens. in Ann. and Mag. N. H. 2d. ser. XVII. 

 p. 227. 

 — — Pfr. Novit. conch. I. n. 215. t. 35. f. 5 — 9. 



Habitat ad Akaouktong, prope fluvium Irawadi imperii Bir- 

 mani (W. Theobald). 



