A MONOGRAPH OF THE SHA-SNAKES (HYDROPHIINA). 209 
Hydrophis spiralis, Boulgr. in Blanford, Fauna Ind. Rept. and Batrach., 1890, 
p. 401; and Cat. Brit. Mus., 18096, ili, p. 273. 
a oy Wall and Evans in Journ. Bomb. Nat. Hist. Soc., xiii, p. 348; 
Wall. in Spol. Zeylan., Augt., 1907, p. 166. 
2a nigrocinctus, Jan, Icon. Gén. 1872, 41, pl. ii, fig. 2. 
a robusta, Giinther, loc. cit., p. 364, in part. 
¥ 35 Fayrer, Thanat. Ind., 1874, pl. xxi. 
Distira robusta, Boulgr.in Blanford, Fauna Bnit.Ind. Rept. and Batrach., 1890, p. 400. 
fh x4 Sclater, List Snakes Ind. Mus., 1891, p. 65. 
mt \ Wall and Evans in Journ. Bomb. Nat. Hist. Soc., xiii, p. 615. 
Ms i Wall in Mem. As. Soc. Bengal, 1906, p. 290. 
? Hydrophis rappii, Jan, loc. cit., 41, pl. iv, fig. I. 
er temporalis, Blanford in Proc. Zool. Soc. Lond., 1881, p. 680, and fig. 
RY bishopu, Murray, Vert. Zool. Sind, 1884, p. 391, and pl. 
, subcinctus, Gray in Zool. Misc., 1842, p. 63; and Cat., 1840, p. 52. 
. as Gunther, loc. cit., p. 368, pl. xxv, fig. F. 
be melanocephalus, Gray, Cat., 1849, p. 53, in part. 
i . Boulgr., Cat. Brit. Mus., iii, p. 283, and pl. xv. 
B 3 melanosoma, Giinther, loc. cit., p. 367, pl. xxv, fig. E. 
Distira melanosoma, Boulgr:, Cat., 1896, iii, p. 291. 
,,+ brugmansii, Boulgr., Cat., 1896, ili, p. 292. 
a ss Wall tn Proc. Zool. Soc. Lond., 1903, p. 96; and in Spol. 
Zeylan., August, 1907, p. 169. 
Hydrophis alcocki, Wall in Mem. As. Soc. Bengal, 1906, p. 288, pl. xv, fig. 3. 
- floweri, Boulgr. in Proc. Zool. Soc. Lond., 1898, p. 106, and plate. 
3 longiceps, Giinther, loc. cit., p. 375, pl. xxv, fig. O. 
Chitulia fasciata, Gray, Cat., 1829, p. 56. 
Fig. 19.—Distira spiralis. 
Under this title I include six species considered distinct by Mr. Boulenger, v7z., 
brugmansw (Boie), subcinctus (Gray), melanocephalus (Gray), melanosoma (Gunther), 
wrayt (Boulenger), floweri (Boulenger), and one described by myself, alcocki (Wall), all 
divided I consider, on insufficient grounds, affecting shields known to be subject to 
variation in this and other allied species. 
spiralis —There are in the British Museum only five specimens labelled spiralis, 
