REALIA. 359 



decussating spiral lines (only visible beueatli llie lens), cusliilalely 

 striated on the upper wliorls (except the two u|)perinost) and 

 close to the suture on the lower whorls, pale riiiesceut brown, 

 with a pale band round the body whorl. Spire conical, apex 

 sharp, suture impressed. Whorls 6, convex ; the last rounded at 

 the periphery and below, ratlialely striated bene.-ith, more stronp;ly 

 in the umbilicus, and having an impressed line at the base around 

 the uud)ilicus in llie phice ol' a keel. Aperture oblique, oval, but 

 little higher than broad, about ii of the length. Peristome thin, 

 the margins ap[)roaching each other and united by a thin callus ; 

 the outer and basal edges simple, columellar margin slightly 

 expanded below, curved back into a shallow re-entering sinus 

 close to the perforation. Operc. ? 



" Length 8^, diam. '2j ; length of aperture 1^, breadth lo mm." 



I/ab. Andaman Is. (Andei'son). 



"Independently of sculpture, the species may be distinguished 

 from 0. distermina by its less globose form, and by the absence of 

 the keel around, the periphery ; from li. andersoni by its much 

 smaller size, irore rounded whorls, and by the absence of the 

 keel; and from It. pcdlida by rounder whorls, by colour, and by 

 its rather more turreted form." {Blanford.) 



554. Eealia pallida, JJlanford. 



Realia i)allida, Blanford, J. A. S. B. xlix, ijavt 2, 1880, p. 217, pi. 2, 

 fig. 19. 



Origincd description: — "Shell perforate, ovately conical, thin, 

 whitish horny, smooth, moderately polished, with faint subobsolete 

 vertical striation. (There is also, beneath the lens, a faint 

 indication of minute spiral striation, but I am not sure that this 

 is not an individual peculiarity.) Spu'e conical, apex acute, suture 

 impressed. Whorls 6, slightly convex, the last rounded at the 

 periphery and below, radiately striated around the perforation. 

 Aperture nearly vertical, ovate, shorter than the spire. Peristome 

 thin, margins approaching each other, joined by a thin callus; the 

 outer lip simple, the columellar slightly expanded. 



" Length 4:j, diam. 3 ; length of aperture 2, breadth ].| mm." 

 (Blanford.) 



Hah. Andaman Is. (Anderson). 



The author states that neither this species nor 0. andersoni can 

 be confounded with the globose 0. distermina with its costulate 

 striation near the suture and inside the umbilicus, its rounded 

 whorls, and its aperture equal in length to the spire. 



