AMPHIDROMUS, GROUP VII. 179 



" BuUmus perversus L.," MABILLE and LE MESLE, J. de C. 1866, 

 p. 129. Poulo Condor and Saigon; with the following varieties: 

 ventricosa, shell short, with the last whorl extremely obese, shell 

 thick. Elongata, shell thick, narrow, lengthened, nearly subulate 

 the whorls of the spire a little swollen. Viridescens, shell of the 

 typical form, with inconspicuous striae, of a deep green color with 

 yellowish zones ; the summit reddish violet. 



Littoral of Cochin China and Siam MORELET, Ser. Conchy 1. iv, 

 p. 257. 



Perak (P. Townsend) ; Siam (Richthofen) ; Saigon and Poulo 

 Condor, French Cochin China (Michau) ; Singapore (J. Irwing). 

 CROSSE, Jour, de Conch. 1879, p. 337. 



Throughout the territories of Perak and Patani, from the plains to 

 1500 meters ; either sinistral or dextral, and very often white, but 

 the yellow variety often met with. J. DE MORGAN, Bull. Soc. Zool. 

 France, 1885, p. 386. 



Luang-prabang, Laos ; dextral, imperforate, of a light yellow color 

 with white, relatively oblique aperture, and quite short contour. 

 ANCEY, Ann. Mus. d'Hist. Nat. Marseille (2), i, p. 133, 1898. 



^Bulimus sultanus Lam.," MABILLE & LE MESLE, Journ. de 

 Conchyl., 1866, p. 129. Saigon ; Poulo-Condor. Also MORELET, 

 Ser. Conch, iv, 258, Cochinchina (Vesco). 



''Bulimus chloris Reeve," MABILLE & LE MESLE, Journ. de Con. 

 cliyl., 1866, p. 129. Saigon and Poulo-Condor (Le Mesle). MORE- 

 LET, Ser. Conch, iv, p. 259. Saigon. J. DE MORGAN, Bull. Soc. 

 Zool. de France, x, 1885, p. 387 (Larut plain and Kinta valley, 

 Perak); cf. MLLDFF., P. Z. S., 1891, p. 336. 



"A. perversus var. chloris" FULTON, Ann. Mag. N. H. (6), xvii, 

 p. 67 (Malay Peninsula). 



7. Group of A. schomburgki. 



Rather solid species, either dextral or sinistral, with dark or bril- 

 liant coloring, the peristome rather wide, and purple or pink. Dis- 

 tribution, Burma, Siam and Annam, to the upper Mekong Valley. 



A. MONILIFERUS (Gould). PL 62, figs. 73, 74. 



Shell conic-oblong, usually sinistral, smooth ; ashen buff' with lon- 

 gitudinal flames, a linear sutural band and an interrupted band be- 

 low the suture, of brown ; umbilical tract brown, divided by a buff 

 line. Whorls 7, the last subcarinated. Aperture subovate, angulute 



