228 AMPHIDROMUS, GROUP XVIII. 



has a couple of yellow bands on the base. It is merely a somewhat 

 less developed pattern of the same form. I doubt whether connectens 

 has any direct connection witli everetti, of which Fulton makes it a 

 variety, but think it holds a i elation to A. pictus parallel to the 

 relation between dubius and everetti. 



FORM FROM SUMATRA, probably referable to A. sumatranus. A 

 single specimen collected at Singkarah by Dr. Max Weber " agrees 

 best with my var. B. from Mandhor [see above]. It shows quite dis- 

 tinctly the pale uninterrupted greenish gray stripes on all the whorls, 

 but no spots and no specially colored sutural band ; on the base of 

 the last whorl there is only one narrow dark-brown band, which 

 stops a half whorl short of the aperture. The immediate vicinity of 

 the perforation shows the characteristic dark rose-red color well 

 developed, and the interior of the aperture is light. It cannot well 

 be doubted that this specimen belongs to A. adamsi and not to A. 

 sumatranus, which has the same smooth, glossy shell with very 

 superficial sutures, but only quite slight traces of stripes, and regular 

 spots at the periphery," etc. (Martens, in Max Weber's Zool. 

 Ergebnisse einer Reise in Niederlandisch Ost-Indien, ii, p. 241. 

 Wiegmann, op. cit., iii, p. 191-204, pi. 14, f. 1-19; pi. 15, f. 1, 

 anatomy of same.) 



Mr. C. Bock collected specimens at Sidjoendjoeng, Paio, etc., in 

 the Padang district of Sumatra, which he refers to A. adamsi, with- 

 out giving any information on their characters (P. Z. S., 1881, p. 

 630). 



A. LINDSTEDTI (Pfeifferj. PI. 70, figs. 70, 71. 



Shell sinistral, imperforate, ovate-conic, solid, striatulate, glossy, 

 white [see below]. Spire long-conic, the apex rather obtuse. 

 Whorls 6^, a little convex, the last about three-sevenths the total 

 length, obsoletely angulated, the base rounded. Columella subver- 

 tical, slightly twisted. Aperture oblique, somewhat semi circular, 

 the peristome slightly thickened, expanded, margins joined by a cal- 

 lus of the same color. Length o9, diam. above aperture 17 mill. 

 (Pfr.) Balabac Island (Everett). 



Bidimus lindstedti PFR., P. Z. S., 1856, p. 388 ; Monogr. iv, p. 

 374 ; vi, p. 20 A. lindstedti FULTON, op. cit. p. 85, pi. 5, f. 15, 15a 

 (1896). 



" The type specimen of this species is in a bleached state ; when 



