218 AMPHIDROMUS, GROUP XVIII. 



yellowish ground, marked by a reddish-brown sutural band ; the 

 spire is buff with oblique chestnut stripes, which are simple, not 

 forked above ; 3 or 4 earlier whorls uniform buff. "The aperture 

 is white with a broad purple-lake band above the pillar." It is 

 sinistral. Andaman Is. (Hanley & Theobald). 



Bulijmis andamanicus Thorp, MSS., HANLEY & THEOBALD, 

 Conchologia Indica, p. 59, pi. 148, f. 10 (1876 or earlier) Arnphi- 

 dromus sp., NEVILL, Handlist of Moll. Ind. Mus., pt. 1, p. 127, no. 

 21 (1878). A. furcillatus var. andamanica FULTON, Ann. Mag. N. 

 H. (6), xvii, p. 77. A. andamanicus var. nicobarica Nev. MS., 

 GODWIN-AUSTEN, P. Z. 8., 1895, p. 443, 450. 



The similarity in coloring to A. furcillatus and A. quadrasi is re- 

 markable, but on account of the widely separated localities it may be 

 inadvisable to unite andamanicus with either, without full investiga- 

 tion. I have not seen the species, and no sufficient account of it has 

 been published. 



Godwin-Austen says of var. nicobaricus * Nevill ' G.-A.; " Of this 

 species I have one specimen from Katchall (Nicobar Is.). It is 

 somewhat larger than Andaman shells, and in color is far paler, and 

 with few markings, and those pale. These differences might not 

 hold good in a large series." 



Fulton states that andamanicus varies 4< from very light to quite a 

 dark color." The figure is a copy of the original. 



A. SUMATRANUS (Martens). PI. 66, figs. 35, 36, 37. 



Shell sinistral, long-conic, smooth, very glossy; buff-whitish, 

 marked with a row of brown spots, and on the base two or three 

 brown bands, the apex pale. Whorls 6, nearly flat. Aperture ovate, 

 three-sevenths the length of the shell ; peristome rather thick, white, 

 somewhat widely expanded ; no parietal callus ; columellar margin 

 slender, straight, nearly perpendicular, making a distinct angle with 

 the basal lip, at the insertion narrowly reflexed and flatly adnate. 

 (Martens.) 



Length 33, diam. 17, aperture 15 mill. 



Length 27, diam. 14^, aperture 12 mill. 



Sumatra : central mountain region near Kepahiang (Martens) ; 

 Indrapcera (Weyers, figs. 36, 37) ; Silago (Snellman). 



Bulimus sumatranus MARTENS, Monatsber. Berl. Akad. Wis- 

 sensch., 1864, p. 526 ; Ostas. Zool., ii, p. 366, pi. 21, f. 6. PFR. 



