AMPHIDROMUS, GROUP XI. 193 



On first view similar to A. sinensis Bens., but differs by its flatter 

 whorls, spiral striation, non-thickened peristome, etc. (Pfr.) 



A. HEMICYCLUS Rochebrune. 



Testa obtuse perforata, elliptice pyramidata, sernicircularis, solida, 

 politissima, alba, fasciis latis violaceis spiraliter cincta ; anfractibus 

 6 ; penultimo sub quadrate ; ultimo spiram superante, intense cur- 

 vato ; apertura elliptica, interne acuta ; peristomate sub recto, labro 

 reflexo, albo ; columella reflexa, obliqua, curvata. Long. 30, lat. 10 

 mill. (Rochelr., Bull. Soc. Philom., Paris, vi, 1881-2, p. 117. 



Bangkok (Bocourt). 



Dr. Jousseaume, who examined the type, thinks this species near 

 A. Itzvis Mull., but distinct. The description does not seem very 

 lucid, and is given without translation. 



11. Group of A. xiengensis. 



Farther -Indian representatives of the Java- Timor group of A. por- 

 cellanus. Rather slender and thin, the spire with flames bisected by 

 a median light line, the base with two spiral bands; or with some 

 modification of this fundamental pattern, or rarely without markings. 

 Apex tipped with a blackish dot. Peristome usually white. Suture 

 generally with a colored border or line below. 



A number of identifications by various authors of Javan or Bor- 

 nean species from Indo-China, were apparently based upon forms of 

 the present group, though the literature, in the absence of descrip- 

 tions, gives no certain clue. The chief references follow : 



A. furcillatus Mouss., ROCHEBRUNE, Bull. Soc. Philomathique de 

 Paris, vi, 1881-2, p. 71. Bords du Prek-Scholl, Cambodia (Dr, 

 Harmand). 



A. lavus Miill., ROCHEBR., 1. c. Montagues de Chaudoe [Chau- 

 doc] (Dr. Harmand). 



A. adamsi Reeve, ROCHEBR., t. c., p. 72. Prek-Scholl, au sud de 

 Cratate (Dr. Harmand). 



Bulimus adamsii Reeve, MABILLE & LEMESLE, Journ. de Con- 

 chyl., 1866, xiv, p. 129. Banone, near Battambang; Phnum- 

 Kretch, Cambodia. 



A. contrarius Miill., MORLET, Journ. de Conchy 1, 1889, p. 127 r 

 Mountains of the Elephant Chain, Cambodia. 

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