88 Mr. H. Fulton on the 



A beautifully coloured shell of very thin substance, quite 

 distinct from any known species. 



Group of A. suraatranus. 



51. A. sumatranus, Martens, Monatsber. d. Berl. Akad. 1864, 



p. 526 ; Mart. Ost-Asien, p. 366, pi. xxi. fig. 6. 



Loc. Sumatra. 



An elegant and distinct species of a light greenish-yellow 

 body-colour, ornamented at lower part of last whorl with four 

 narrow bands, and a row of spots above at the periphery. 



Group of A. Begini. 



52. A. Begini, Morlet, Journ. de Con. 1886, p. 74 ; id. 1889, 



pl/vi. fig. 4. 



Loc. Cambodia. 



Easily separated from all other known species of this 

 genus by its remarkable oblique strongly costate sculpture. 



Group of A. Mouhoti. 



53. A. Mouhoti, Pfeiffer, Proc. Zool. Soc. 1861, p. 194; 



Novit. Conch, no. 269, pi. xlvi. figs. 5, 6. (PI. VII. 

 tig. 11.) 



Loc. Siam. 



Prof. v. Martens, in his ' Ost-Asien Moll.,' classes this 

 species as a variety of Schomburgki • but I am quite unable 

 to see the connexion between these, to me, perfectly distinct 

 species. 



54. A. Smithii, Fulton. (PI. VII. figs. 12, 12 a.) 



Loc. Annam (Eudel). 



Shell sinistral, oblong-conic, imperforate, rather thin, white ; 

 suture impressed and slightly crenulated, last one and a half 

 whorls covered with close- set oblique green lines, which are 

 crossed by fine spiral lines of a darker colour ; a narrow dark 

 green band at the suture of lower whorls fading to yellow 

 above ; whorls 7, slightly convex, third whorl with two spiral 

 rows of light brown spots ; columella straight, scarcely ex- 

 panded above ; lip narrowly expanded and reflected ; lip and 

 columella dark brown. 



Long. 35 millim., maj. diam. 16 millim. (mature specimen). 

 „ 39 „ „ 17 „ (lip not expanded). 



