186 AMPHIDROMUS, GROUP VIII. 



c. 1 form broader ; spirally striate, not maculate above. 



roseolabiatus, p. 188. 

 b l . peristome dark brown diam. less than half the length. 



smithii, p. 186. 



a 1 . Shell pale yellow with roseate apex ; last whorl obtusely an- 

 gular, with an orange sutural border ; peristome purple. 



cruentatus* p. 187. 

 A. MOUHOTI (Pfeiffer). PI. 60, figs. 33, 34, 35. 



Shell sinistral, subperforate, oblong-conic, thin, very delicately 

 striatulate, little shining ; buff] closely painted with hair-like green 

 streaks. Spire long-conic, the apex rather acute, reddish. Whorls 

 7, scarcely convex, the upper ones sometimes tessellate with brown ; 

 last whorl three-sevenths the total length, subangulate in the middle, 

 tapering basally and subcompressed. Columella little thickened, 

 twisted, pale lilac. Aperture oblique, semi-oval, the base somewhat 

 effuse ; peristome thin, expanded, lilac-rose colored. Length 34, 

 diam. 14, aperture 15 mill (P/r.). 



Siam (Mouhot) ; Brelum^ in the Stiengs country, Cochinchina 

 (Massin). 



Bulimus mouhoti PFR., P. Z. S., 1861, p. 194; Novit. Conch., p. 



170, pi. 46, f. 5, 6; Monogr. Hel. Viv., vi, p. 30 MORELET, 



Series Conchyliologiques iv, p. 263 B. schomburgki var. mouhoti 

 MARTENS, Ostas. Landschn., p. 80 Amphidromus mouhoti Pfr., 

 FISCHER, Soc. d'Hist. Nat. d'Autun, iv Bull., 1891, p. 116. 

 FULTON, t. c., p. 88, pi. 7, f. 11 (1896). 



The light green striae of the last whorl vary from numerous to 

 merely vestigial. The species is named in honor of M. Henri 

 Mouhot, the intrepid Cambodian traveler, who lost his life by fever 

 in exploring the Mekong valley. 



A. SMITHII Fulton. PI. 60, figs. 37, 38. 



" Shell sinistral oblong-conic, imperforate, rather thin, white ; 

 suture impressed and slightly crenulated, last one and a half whorls 

 covered with close-set oblique green lines, which are crossed by fine 

 spiral lines of a darker color ; a narrow, dark green band at the 

 suture of the lower whorls fading to yellow above ; whorls 7, slightly 

 convex, third whorl with two spiral rows of light-brown spots ^ 

 columella straight, scarcely expanded above ; lip narrowly expanded 

 and reflected ; lip and columella dark brown " (Fulton}. 



