Species o/' Amphidronms, Albers. 69 



black apex (this character is not always present), its closer 

 and finer oblique stripes, and in being somewhat smoother. 



A. perversus, var. natunensis^ Fulton. 



=perversus, Smith, Aim. & Mag. Nat. Hist. 1894, xiii. p. 457. 



Loc. Natuna Islands. 



Like interruptus, but generally somewhat larger, de- 

 pressed at the sutural area ; coloration varies from white, 

 with one oblique dark brown stripe, to specimens coloured 

 like melanomma, except that the stripes do not extend right 

 across the whorls, but stop short, leaving a broad white band 

 below the suture. 



A. perversus^ var. strigosa^ Martens, Ost-Asien, p. 346, pi. xx. 

 fig. 6. 



Very near interruptus and melanomma^ but the whole shell 

 is closely covered with oblique dark reddish-brown stripes. 



xl. perversus, var. leucoxantha^ Martens, Monatsber. Berl. 

 Akad. 1864, p. 526; Ost-Asien, p. 348, pi. xx. figs. 11, 

 12. 



= B. citrinus, Reeve (pars), Con. Icon. fig. 1876. 



According to Martens's figures this is very variable in 

 form, but chiefly characterized by having a broad white band 

 below and encircling the suture. To me the figure in Reeve's 

 * Iconica ' represents this variety ; the other figures which were 

 afterwards referred to this variety by Martens appear to me 

 to be different. 



A. perversus, WSLV. atricallosa, Gould, Proc. Bost. Soc. Nat. 

 Hist. 1843, vol. i. p. 140; Bost. Journ. iv. p. 457, 

 pi. xxiv. fig. 3. 



= eques, Pfeiffer, Malak. Blatt. 1857, vol. iv. p. 158. 



Loc. Tavoy, Burmah. 



In typical specimens the more globose form, the darker 

 colour on parietal wall, and the more expanded lip separate 

 this from leucoxantha ; but some specimens show this variety 

 to be closely connected with it. B. eques, Pf., is a decorti- 

 cated specimen of atricallosa. 



2. A. cochinchinensisy Pfeiffer, Proc. Zool. Soc. 1856, p. 331. 

 (PI. VI. fig. 6.) 



A cylindrical elongated form of a uniform pale yellow 

 colour. May possibly prove to be but a var. oi perversus. 



