226 AMPHIUIIOMUS, GROUP XVIII. 



A. placidus FULT., t. c., p. 84, pi. 5, f. 11 (1896). 

 Seems to be hardly separable from the. last except by the tinted 

 lip. Type in British Museum. 



Subsp. ANGULATUS Fulton. PI. 70, fig. 61. 



"Shell sinistral, ovate-conic, thin, more or less sharply angulate at 

 the periphery, obliquely striate, umbilicus almost covered ; whorls 

 6^ to 7, slightly convex ; color either fawn with oblique brown stripes 

 on upper whorls or pule yellow with "bluish-green stripes, banded at 

 lower part of last whorl; columella white, straight, rather thin ; lip 

 somewhat expanded, white ; interior of aperture dark brown." 

 (Fulton.} 



Long. 37 mill., maj. diam. 20 mill. 



Long. 35 mill., maj. diam. 19 mill. Sarawak, Borneo. 



A. angulalus FULT., t. c., p. 84, no. 42, pi. G, f. 3 (1896). 



" Chiefly distinguished by its dark coloration and angular per- 

 iphery. I think it probable that hamatus, placidus, and angulatus are 

 only varieties of Adamsi" (Fulton.) 



A. nexus Fulton. PL 70, fig. 62. 



Shell sinistral, subhn perforate, conic, moderately solid, polished. 

 Ground color yellow, fading to corneous on the earlier 1^ whorls, 

 the next whorl with reddish- brown stripes, following whorls covered 

 with broad, oblique bluish-gray or brownish-gray stripes, which but 

 rarely fork, the lest whorl broadly striped above, having a more purple- 

 gray band below the periphery and another on the base, a red crescent 

 encircling the whole columella. Suture with a very narrow light bor- 

 der below. Whorls 6^, the apex with a brown dot. Aperture deep 

 purple-brown within, with white hands and stripes ; peristome re- 

 flexed, white. Columella triangularly dilated, white or tinted. 



Length 34^-37^, diam. 19, longest axis of aperture 17-18 mill. 



Length 37, diam. 17 mill. 



Kina Balu, North Borneo; also Saraivak territory (Doria & Bec- 

 cari). 



A. pictus FULT., t. c. p. 85, pi. 5, f. 8 ; with var. concinna pi. 5, 



f. 9 (1896) B. adanisi Martens, Ostas. Zool., p. 357, pi. 21, f. ob. 



ISSEL, Ann. Mus. Civ. Genov., 1874, p. 413, " individuo raccolto 



a Sarawak." 



Form concinnus Fulton. PI. 70, fig. 63. 



" Color bluish-grey, with a dark-green zone encircling lower half 



