ALYCAEUS §. 8. 
55 
39 . A* ereiiiilatus BenNon. 
„T. umbilicata, depresso-turbinata, dense oblique costu- 
lata; spira conoidea, sutura profundiuscula , apice papillari; 
anfr. 4 convexis, ultimo rotundato, ad latus inflato, eo costulis 
confertioribus ornato, turn juxta peristoma breviter constricto, 
laevi, tubulo suturali elongato non procul ab apertura oriente 
munito, apertura vix obliqua, circulari; peristomatis labro 
subduplici incrassato, exteriore reflexo, interiore crenulato, 
quadriplicate aperturam vix coarctante, labio simplici, tenui, 
marginibus callo crasso prominente junctis ; umbilico profundo, 
margine rotundato. — Operc.? — Diam. maj. 4, min. 3^3? 
axis 3 mill.“ (B. ) 
Alycaeus crcnulatus Bens, in Ann. and Mag. nat. hist. 3 d. ser. III. 
(Mart. 1859) p. 180. 
Habitat in valle Rungun. 
VI ? Opisthostoma Blanford. 
„Testa operculata ? Anfractibus apicalibus obliquiter de- 
flexis, anfractu ultimo constricto, deinde inflato, denique sini- 
strorsim ascendente, anfractibus superioribus contiguo ; aper- 
tura re versa, rotundata, continua; peristomate duplicate. “ 
Opisihostoma W. T. ^ H. F. Journ. Asiat. Soc. B eng. XXIX. 
1861. p. 121; Contrib. to Ind. Malac. I. p 5. 
„Novum genus Operculatorum?, inter Alycaeum et Diplommatinam 
medium." (Bl.) Cf. Dohrn in Malak. Bl. X. 1863. p. 39, et W. Blanford 
in Ann. and Mag. nat. hist. Jun. 1864. 
Species unica: 
1 . ]¥ilgii*ica Blanford. f 
„Testa minima, truncate pupiformis, anguste umbilicata; 
spira irregulari, apice obtusa, obliqua, sutura profunda ; costu- 
lata, interspatiis minutissime decussatis, albida, translucens. 
Anfractus rotundati, 5, quorum duo primi obliquiter contorti ; 
ultimus constrictus, deinde inflatus, refractus, ascendens, deni- 
que sinistrorsus, anfractum penultimum contingens. Apertura 
subobliqua, superne versata, orbicularis. Peristoma continuum, 
incrassatum, duplicatum. — Diam. maj. 1, 3, alt. 1, 1 mill.“ (BU) 
277. 
278 . 
