84 Mr. H. Fulton on the 



Long. 41 millim., maj. diam. 16 millim. 

 j, 36 „ „ 18 „ 



„ 29 j, „ 14 „ 



A. Adamsi, var. rubiginosa, Fulton. 



= l<evus, F6r. Hist. pi. clxi. figs. 11, 14, 15, and 18. 



Loc. N. Borneo. 



Last whorl rusty brown, fading to dirty white on upper 

 whorls ; lower halt" of last whorl is darker than the upper 

 part, the difference being more or less sharply defined ; some- 

 times ornamented with oblique brown-coloured stripes and a 

 reddish-brown fillet at the suture ; lip and columella white ; 

 at umbilical area is a narrow zone of brown colour extending 

 over the columella at point of insertion. 



40. A. hamatus, Fulton. (PI. V. fig. 13.) 



Loc. Labuan Island. 



Shell sinistral, ovate-conic, almost imperforate, thin, ob- 

 liquely striate ; whorls 6 to 6^, convex, somewhat depressed 

 at the suture; colour either yellow or suffused with pink, 

 with a light red-brown zone at the umbilical area and a band 

 of the same colour just below the periphery ; whorls orna- 

 mented with short hooked or zigzag markings; columella 

 white, thin ; lip white and slightly expanded. 



Long. 27 millim., maj. diam. 13 millim. 



41. A.placidus, Fulton. (PI. V. fig. 11.) 



Loc. East Borneo. 



Shell sinistral, broadly conical, slightly perforate, thin, 

 obliquely striate, somewhat angulate at the periphery ; whorls 

 6, slightly convex, apex brown ; apical whorls white, lower 

 of a pale lemon-colour ; columella straight, rather thin, 

 slightly expanded, white at upper part; lip pale purple- 

 brown, expanded and slightly reflected. 



Long. 31 millim., maj. diam. 16 millim. 



Type in British Museum. 



42. A. angulatus, Fulton. (PI. VI. fig. 3.) 



Loc. Sarawak. 



Shell sinistral, ovate-conic, thin, more or less sharply angu- 

 late at the periphery, obliquely striate, umbilicus almost 

 covered; whorls 6^ to 7, slightly convex ; colour either fawn 

 with oblique brown stripes on upper whorls or pale yellow 

 with bluish-grey stripes, banded at lower part of last whorl ; 



