Species o/'Amphidromus, Albers. 85 



columella white, straight, rather thin; lip somewhat ex- 

 panded, white ; interior of aperture dark brown. 



Long. 37 millim., maj. diam. 20 millim. 

 „ 35 „ „ 19 „ 



Chiefly distinguished by its dark coloration and angular 

 periphery. I think it probable that hamatus, placidus, and 

 angulatus are only varieties of Adamsi. 



43. A. pictus, Fulton. (PI. V. fig. 8.) 



Loc. Kina Balu, North Borneo. 



Shell sinistral, oblong-conic, almost imperforate, shining ; 

 whorls 7, convex, microscopically spirally striate, impressed 

 at the suture ; colour lemon, almost covered by oblique broad 

 bluish-grey stripes, last whorl with two dark brown bands at 

 the lower part ; columellar area pink ; columella straight, 

 white, slightly expanded at point of insertion; lip white, 

 expanded and reflected ; interior of aperture of a purple- 

 brown colour. 



Long. 37 millim., maj. diam. 17 millim. 



A. pictus, var. concinna, Fulton. (PI. V. fig. 9.) 

 = Adamsi, var., Martens, Ost-Asien, p. 357, pi. xxi. fig. 5 a. 



Loc. Kina Balu, N. Borneo. 



Colour bluish grey, with a dark green zone encircling lower 

 half of the upper whorls, interrupted by equidistant, short, 

 oblique stripes ; this interrupted band is continued on last 

 whorl at the periphery ; lip and columella pink. Compared 

 with, jrictus the whorls are more convex, the aperture smaller ; 

 the basal bands are sometimes absent in this variety. 



44. A. Lindstedti, Pfeiffer, Proc. Zool. Soc. 1856, p. 358. 



(PI. V. figs. 15, 15 a.) 



Loc. Malacca (Lindstedt), Balabac Island (Everett). 



The type specimen of this species is in a bleached 

 state ; when in good condition it is yellow at lower whorls, 

 fading to white above ; sometimes the lower whorls are orna- 

 mented with oblique narrow pale green stripes, with a narrow 

 orange band at the suture. 



45. A. quadrasi, Hidalgo, Journ. de Con. 1887, p. 36, 



pi. n. fig. 2. 



Loc. Balabac Island. 



Separated from Lindstedti by its different coloration, its 

 shorter aperture, and thinner columella, which is not dedected 

 at the point of insertion as in that species. 



