HYBOCYSTIS. ^ 57 



leviter sursura spectans, circularis, fauce fusca ; perist. albidum, 

 incrassatum, superne angulatum, expansum et reflexiusculum, 

 intus late sulcatum , tum calloso-marginatum , callo interiore 

 dextrorsum superne angulato-sinuato, sutura canalis obsoleti 

 ad angulum anticura raro apparente. — Operc. typicum. — 

 Long. 35, diam. anfr. penult. 20 mill. Apert. diam. (excluso 

 perist.) 11 mill. (Coll. Nr. 64.) 



Megalomastorna gravidum Bens, in Aiin. and Mag. n. h. 2 d. ser. XVII. 

 (Mart. 1856.) p. 229. 



— — Pfr. Mon. Pneum. Suppl. p. 79. 

 Cijclostoma 2>ollex Gould Proc. Bost. Soc. VI. 18.56. Oct. p. 13; Otia 



conch. p. 221. 

 Hybocystis gravkla Bens. in Ann. and Mag. n. ser. IV. (Aug. 1859.) p. 91. 



— — Pfr. Novit. conch. I. p. 123. n. 214. t. 35. f. 1. 2. 

 /?. Minor, rutb-carnea, anfr. ^''^; long. 27, diam. 14'/2 mill (^Pfr. Novit. 



conch. t. 35. f. 3. 4.) 



Habitat Moulmein Birmanorum (Theobald). 



Obs. Specimina juniora quondam sub nomine Olopomotis Blfnni 

 a Cl. Benson descripta sunt (conf. Pfr. Mon. Pneum. Suppl. p. 111), 

 quare haec species, monente ipso Auctore (Ann. and Mag. n. h. Aug. 1859) 

 omnino delenda est. 



2. H. Jfloiilioti Pfr. 280. 



T. subumbilicata, compresse pupaeformis, solida, stria- 

 tula, saturate fusco-violacea; spira irregulariter oblonga; anfr. 

 6, primi 4 convexiusculi, conum subregularem formantes, 

 penultimus multo longior, ultimus latere aperturae complanatus, 

 tum profunde descendens, foveolato-malleatus, antice arcuatim 

 ascendens ; apertura obliqua (basi axin excedens), angulato- 

 ovalis, intus purpurascenti-fusca; perist. rufo-aurantiacum, in- 

 crassatum, duplicatum et reflexum, margine parietjiJi subhori- 

 zontali, dextro ad angulum insertionis sursum producto. — 

 Operc. testaceum, pagina interna castaneo-callosa. — Long. 

 35, diam. 17 mill. Ap. c. perist. 13 mill. alta, K'/^ lata. 

 (CoII. Nr. 65.) 



Htjbocystis Moulwli Pfr. in Proc. Zool. Soc. 1862. p. 276. t. 36. f. 13. 



— — Pfr. Novit. conch. I. p. 227. Nr. 330. t. 59. f. 5 -8. 

 Habitat in montibus Lao dictis Cambojae (Mouhot). 



3. My ersi Hain. f [Pollicaria Myersii Gould. in 281. 



Proc. Bost. Soc. VI. p. 13; Otia conch. p. 221. 



— Megrdomasloma Myersi Hain , Pfr. — 



Siam.) Pneum. II. p. 79. 



