32 PTEROCYCLOS §. 3. 4. 



14. Pt* Ce<ra Benson. 



T. late umbilicata, ovbiculato-depressa, capillaceo-striatula, 

 luteo-cornca, superne strigis radiatis, subreniotis, irregularibus, 

 rufis ornata; spira planata, apice vix prominulo; anfr. 5 con- 

 vexiusculi, regulariter accrescentes, ultimus breviter descendens, 

 circa umbilicum dimidium diametri subaequantera subangula- 

 tus; apertura obliqua, circularis; perist. duplex: internum con- 

 tinuum , breviter porrectum , superne brevitcr emarginatura, 

 externum expansum , incrassatum , superne lingua obtusa vix 

 descendente, sinu profundo ab anfractu penultimo separata, 

 munitum. — Operc. ? — Diam. maj. 13, min. 10, alt. 4 mill. 

 (Goll. Benson.) 



Pferocydos Cdm licns. in Ann. and Mag. N. H. 2d. ser. XVII. p. 228. 



— — Pfr. Novit. conch. I. n. 216. t. 35. f. 10 — 12. 

 Habitat ad Moulmein et in valle Tenasserim imperii Birmani 

 (W. Theobald). 



15. Pt. tener ITIenke. 



T. umbilicata, depressa, tenera, costis prominentibus mem- 

 branaceis munita, pellucida, virenti-cornea ; spii'a medio vix 

 elevata; anfr. 5 convexiusculi, ultimus teres, antice solutus; 

 umbilicus latus, 2^5 diametri subaequans; apertura parum ob- 

 liqua, subcircularis , intus leviter margaritacea; perist. sub- 

 duplex:*internum superne breviter incisum , practerea subad- 

 natum , externum brevissime patens, incisuram prominentia 

 levi tubuliformi obtegens. — Operc. ? — Diam. inaj. 17, 

 min. 13 , alt. 6 raill. Ap. diara. 5-/3 mill. (Mus. Menke et 

 Coll. Nr. 41.) 

 Pterocydos tener Menke in Malakoz. Bl. III. 1856. p. 69. 



— — Pfr. Novit. conch. I. p. 90. n. 154. t. 25. f. 13—15. 

 Habitat Touranne Cochinchinae. 



§. 4. 



16. Blnndi Bens. f {Gray Phan. p. 31. — Jd. 



Gen. p. 277.) Mon. p. 49. 



17. Troseheli Bens. f {Gray Phan. p. 27. — ,4d. 



Gen. p. 277.) - - 44. 



IV. Alycaeiis Gray. 



Conf. Pfr. Mon. Pneura. p. 119. — Gray Cat. Phan. 

 p. 84: genus Cyclophorinorura. — Bena. in Ann. and Mag. 



