182 AMPHIDROMUS, GROUP VII. 



colnmellar margin straight. Length 38, cliam. 14, length of aper- 

 ture 17, width 9 mill (Rochebrune). 



Cambodia: Forests of Prek-Scholl, south of Cratate (Dr. Har- 

 mand). 



The biserial arrangement of spots and white peristome do not agree 

 well with the Siamese species ; more information is needed. 



A. SCHOMBURGKI (Pfeiffer). PI. 59, fig. 30. 



Shell subimperforate, dextral or sinistral, solid, striatulate ; green 

 with darker streaks when fresh (violaceous when worn), the apex 

 purple-black. Spire conic, the apex.rather acute. Whorls 7, a little 

 convex, the upper ones banded with violaceous, last whorl shorter 

 than the spire, tapering at base. Columella inflated, somewhat 

 straightened, violaceous. Aperture a little oblique, truncate-oval, 

 white within ; peristome thickened, reflexed, lilac colored, the margins 

 joined by a blackish-chestmit parietal callus ; columellar margin 

 dilated, reflexed and overhanging, subadnate. Length 48, cliam. 

 above aperture 23, aperture inside 21 mill. long. (Pfr.) 



Siam : Srakao ; mountains of the Elephant chain, on bamboos 

 (Pavie). 



Bulimus schomburgki PFR., P. Z. S., 1860, p. 137, pi. 51, f. 9 ; 

 Mahik. Blatter 1861, p. 12; Monogr. vi, p. 18. MORELET, Ser. 

 Conch, iv, p. 262 (includes B. crossei). MARTENS, Ostas. Zool. ii, 

 pp. 79, 80, with varieties leyitimiis (== typical schomburgki), crossei, 

 moi<hoti,fasciatus. Amphidromus schomburgki Pfr., MORLET, Journ- 

 de Conchyl. 1889, p. 127. FULTON, Ann. Mag. N. H. (6), xvii, p. 

 90 (1896). Bulimus crossei PFR., Journ. de Conchyl. 1862, p. 43? 

 pi. 5, f. 1 ; Monogr. vi, p. 26. 



The typical schomburgki is "a stout shell with a well-developed 

 and thickened lip, the last two whorls almost covered with oblique 

 bright green stripes; lip, columella and callus of a purple color" 

 (Fulton). It was named for Sir Robert Schomburgk, Her Majesty's 

 Consul-General to Siam, 1857-1864, who first obtained specimens. 

 Var. crossei Pfr. PI. 59, fig. 31. 



Roseate under a fugacious greenish cuticle ; outer lip violet, colu- 

 mella and parietal wall dark brown. Length 37-35^ mill. It occurs 

 both dextral and sinistral. Siam. The type was in coll. Bernardi. 



A. H.EMATOSTOMA MoellendorflT. 



Shell imperforate or rimate, sinistral, ovate-conic, rather solid, 



