192 1.] B. PuASHAD : Siinialvan Molluscs. 491 



and are very little swollen. The suture is oblique and moderately 

 impressed. The body-whorl is broadly ovoidal, narrow above, 

 gradually widening to the region of the mf)Uth, where, owing 

 to the greater part of the mouth lying outside the median axis, it 

 is broadest. In dorsal view the outer profile of the body-whorl is 

 slightly arched in the upper half and then suddenly curves down- 

 wards and inwards, and has a somewhat sinuate course. The 

 inner profile is regularly curved. The mouth is of fair size, being 

 a little more than half the size of the body-whorl; it is ovoid in 

 outline with the basal margin regularly curved and drawn to an 

 acute angle at the apex. The outer lip is only slightly thickened ; 

 seen from the side it shows a distinctly sinuate outline. The colu- 

 mella is narrow and slightly bent. The surface of the shell in 

 young shells on the first 4-5 whorls shows regular transverse ridges, 

 these become obsolete in adult shells, and are quite absent on the 

 penultimate and the body-whorl ; on these two wliorls fine longi- 

 tudinal striae are always present. The shells are blackish in col- 

 our, but the whole or a part of the body-whorl along the outer 

 lip in the region of growth is dull olivaceous or yellowish ; in this 

 region a few vertical brownish stripes are also present. 



The tj'pe-specimen measures 22'2 ram. in length by 8"i 

 mm. in maximum breadth, the aperture measures 8 mm. by 47 

 mm. 



Locality. — A large number of specimens of this species were 

 collected by Mr. den Doc.p in the Kroeeng Seunara (-Sabang) ; 

 streamlet from the Prise d'eau of Sabang ; and in fresh-water areas 

 near Boelan and Padang Boelan. 



Remarks. — The species is nearly allied to M. timforinis but is 

 distinguished by its shape, position and form of the mouth and by 

 its sculpture. 



Melanodies litigosa (Brot). 



1874. Melaiiia litigosa, Brot, op. cit., pp. 170, 171, pi. xx. fig. 5, 50, h. 

 1897. \Melania litigosa. v. Martens, op. cit.. pp. 48, 49. 



A single specimen from a streamlet along the road to Anak 

 Laut (Sabang) agrees well with Brot's description and figures. 



Subgenus Plotia, A. Adams = Melanoides, s.s. 

 Melanoides tubcrculata (Miill.). 



1897. Melan'.a liiberciilata, v.- Martens, op. cit., p. 56. 

 igig. Melanoides ttibercuLaiti. Annandale and Prasliad, Rec. hid. Mus. 

 -Win, pp. 31, 32. pi. iv, fig. I. 



Although .-1. tuherculata, as Dr. Annandale and I stated in the 

 above-cited paper, has a wide range from the Mediterranean to 

 Australia and China, there is no evidence of its occurrence in 

 Baluchistan or Southern Persia. There are no specimens of the 

 typical form in the Sumatrau collection, but specimens of four 

 vaiieties are present. 



