170 AMPHIDROMUS, GROUP A T I. 



MABILLE & LE MESLE, J. de C., 18G6, p. 128 Cochlostyla 



anrtamitica TAPPORONE-CANEFRI, Zool. Magenta, p. 81 (1874). 

 Amphidromus annamiticus MORELET, Journ. de Conchyl. 1889, p. 

 126 ANCEY> Ann. Mus. d'Hist. Nat. Marseille, Ser. 2, Bulletin i, 

 p. 141. A. inversus subsp. annamiticus C. & F., MLLDFF., Nachbl. 

 1898, p. 73. 



Well distinguished from typical inversus by the thick spire of al- 

 most flat whorls, faintly margined but not impressed at the sutures. 

 The specimens examined by Crosse and Fischer and myself are 

 dextral, but a single sinistral example is on record. It seems to be 

 a well marked subspecies, confined so far as known to the lower 

 Mekong drainage in lower Cochin China and Cambodia. 



A color-variety roseotincta of von Mollendorff is without the dark 

 border above the sutures of the early whorls, which are of a uniform 

 rose color. (Nachrbl., 1898, p. 73, and Fulton, /. c., p. 70, 1896.) 



A. COMES (Pfeiffer). PI. 57, figs. 1-5. 



Shell dextral or sinistral, nearly imperforate, ovate-conic, solid, 

 striatulate, glossy. Spire almost straightly conic, rather acute ; 

 whorls [6^ to] 7, a little convex, the earlier 5 flesh-tinted, the upper 

 one black-margined above the suture, last 2 whorls buff, variously 

 banded, streaked or clouded with livid-greenish, [or whitish fleshy 

 above, becoming banded with reddish-brown along the suture both 

 above and below, interrupted on the penult, whorl by a broad light 

 yellow varix or two, apical whorl white with a purple band above 

 the suture ; the last two whorls mingled yellow and greenish, clouded 

 or banded with reddish brown shading to olive ; a broad yellow stripe 

 behind the outer lip. Or with the spire similarly colored, the last two 

 whorls may be bright yellow, unicolored except for narrow olivaceous 

 or brownish streaks ; apex sometimes wanting the dark band]. Last 

 whorl a little shorter than the spire, rotund below. Aperture ob- 

 lique, irregularly semioval, [faintly] subangulate at base, white 

 within ; peristome spreading and a little reflexed [the edge white, 

 recurved but not appressed] ; parietal callus white, entering ; colu- 

 mella rather thick, subvertical, white. 



Alt. 46, diam. 27, longest axis of aperture 25 mill. 



Alt. 51, diam. 30, longest axis of aperture 27 mill. 



Alt. 44, diam. 25, longest axis of aperture 23 mill. 



Cambodia (Pfr.): in the pepper plantations of Kampot, Compenlra,. 



