HYBOCYSTIS. 
57 
leviter sursum spectans, circularis, faucefusca; perist. albidum, 
incrassatum, superne angulatum, expansum et reflexiusculum, 
intus late sulcatum , turn calloso-marginatum , callo interiore 
dextrorsum superne angulato-sinuato, sutura canalis obsoleti 
ad angulum anticum raro apparente. — Operc. typicum. — 
Long. 35, diam» anfr. penult. 20 mill. Apert, diam. (excluso 
perist.) 11 mill. (Coll. Nr. 64.) 
Megnlomastoma gravidum Bens, in Ann. and Mag. n. h. 2 d. ser. XVII. 
(Mart. 1856.) p. 229. 
— — Pfr. Mon. Pneum. Suppl. p. 79. 
Cgclostoma pollex Gould Proc. Post. Soc. VI. 1856. Oct. p. 13; Otia 
conch, p. 221. 
Hybocystis gravida 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, rufo-carnea, anfr. 5 Y 2 5 long. 27, diam. 14‘/2 wiill {Pfr. Novit. 
conch, t. 35. f. 3. 4.) 
Habitat Moulmein Birmanorum (Theobald). 
Obs. Speciraina juniora quondam sub nomine Olopoinatis Blertni 
a Cl. Benson descripta sunt (conf. Pfr. Mon. Pneum. Suppl. p. Ill), 
quare haec species, monente ipso Auctore (Ann. and Mag. n. h. Aug. 1859) 
omnino delenda est. 
2. H. ]?Ioiilioti 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, 
turn 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 parietali 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, 14^/4 lata. 
(Coll. Nr. 65.) 
Hybocystis Mouhoti 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. Myersi Hain. f [Pollicaria Myersii Gould, in 281. 
Proc. Bost. Soc. VI. p. 13; Otia conch, p. 221. 
— Megalomasloma Myersi Hain , Pfr. — 
Siam.) Pneum. II. p. 79. 
