188 AMPH1DKOMUS, GROUPS IX, X. 



A. ROSEOLABIATUS Fulton. PL 60, figs. 36. 



" Shell sinistral, ovate-conic, moderately umbilicated, rather solid ; 

 whorls 6^-, slightly convex ; obsoletely angulated at the periphery ; 

 white above, lower whorls pale lemon, with oblique close-set light 

 green lines; spirally striated; lip and columella pink, expanded, lip 

 somewhat reflected ; interior of aperture white. Long. 36 mill., 

 maj. diam. 21 mill" {Fulton}. Siam. 



A. roseolabiatus FULTON, Ann. Mag. N. H. (6), xvii, p. 89, pi. 

 6, f. 8 (January, 1896). 



** This species is described from two specimens (young and adult); 

 they were upon a tablet with the type of Mouhoti, from which they 

 can be separated by the much broader form, the more distinct spiral 

 striae, and by the absence of markings on the upper whorls" (Fulton). 



9. Group of A. begini. 

 A. BEGINI (L. Morlet). PI. 59, figs. 28, 29. 



Shell sinistral, almost covered rimate, fusiform, thin, shining ; 

 white, ornamented with irregular brown flames, and covered with 

 irregular longitudinal ribs, some of them forked. Spire elevated, 

 composed of 6-7 convex and rapidly increasing whorls, separated by 

 a noticeably crenulate suture ; the first three whorls smooth, with 

 bright brown apex, the others ribbed ; last whorl swollen, two-thirds 

 the entire length of the shell. Aperture subangular below, white 

 within, showing the flames by transparence; peristome brown, 

 rounded, a little thickened and reflexed ; columellar margin straight, 

 bright brown, dilated and in large part covering the umbilical chink. 

 Length 25, diam. 13, aperture 12 mill. (Mori.}. 



Cambodia : Plateau of Stung-Trang (Pavie). 



Bulimus (Amphidromus) begini L. MORLET, Journ. de Conchyl., 

 xxxiv, 1886, p. 74. Amphidromus begini L. MORLET, Journ. de 

 Conchyl., xxxvii, 1889, p. 128, 177, pi. 6, f. 4 FULTON, t. c., p. 88. 



The corrugated surface readily distinguishes this from all other 

 species known. 



10. Group of A. sylheticus. 



Small, sinistral species, uniform pale yellow or with two bands on 

 the base, the peristome white, a shallow groove or gutter at the 

 junction of the columella with the body. Apex punctate. Khasi 

 Hills to the Mergui Is. and eastward. 



