200 AMPHIDROMUS, GROUP XII. 



more solid, and differs in having a purple peristome, externally 

 black -brown, wider stripes, and a reddish subsutural line. Figured 

 from one of the types, kindly sent by Mr. C. F. Ancey. 



Dr. von Mollendorff describes an A. zebrinus subsp. fuscolabris as 

 somewhat larger than typical zebrinus, length 27, diam. 13 mill., the 

 lip less expanded, dark brown ; otherwise the same. It is from the 

 Boloven Plateau, western Annam, on the left bank of the Mekong 

 River (C. Roebelen). This form is apparently identical with A. 

 eudeli Ancey. 



12. Group of A. porcellanus. 



Spire decorated with flames or stripes bisected by a submedian 

 light line. Distribution, Java, Southern Celebes and islands to the 

 southward of Celebes, above the Timor-Java chain. 



The separation of this from the preceeding group is merely one 

 of convenience. 



A. POECILOCHROA < Bttg.' Fulton. PL 64, figs. 1, 2, 3. 



Shell nearly or quite imperforate, sinistral, thin, ovate-conic, 

 polished and glossy, faintly striatulate. Pale lemon-yellow, fading 

 to whitish on the spire, marked above the periphery with wide purple- 

 brown stripes not reaching to the suture, and bisected by a yellow 

 spiral band running about midway between sutures, on the last half- 

 whorl changing to reddish, and accompanied by a narrow dark 

 band ; many of the stripes on the spire forked above ; base with two 

 wide purple-brown spiral bands and an umbilical patch, separated by 

 two paler bands, the upper one narrow and yellow, the lower wider 

 and reddish. "Whorls 6-|> the earlier 1 J uniform fleshy brown ; 

 suture moderately impressed, narrowly edged with black-brown below, 

 this bordered again by a whitish margin. Aperture showing the 

 color pattern within ; peristome narrowly expanded, flesh-tinted. 

 Columella vertical, its edge rather narrowly reflexed. 



Alt. 35, diam. 19 mill. (type). 



Alt. 34, diam. 18, longest axis of aperture 17 mill. 



Sumbawa Island. 



A. poecilochroa (Boettger MSS.) FULTON, Ann. Mag. N. H. (6), 

 xvii, p. 77, pi. 6, f. 7 (Jan., 1896) Bui. contrarius MOUSSON, 

 Moll. Java, p. 115. 



Evidently allied to A. porcellanus, differing in the more ventricose 

 shape and consequently longer aperture, narrower columella, and 



