A MONOGRAPH OF THE SEA-SNAKES (HYDROPHIIN^J). 209 



Hydrophis spiralis, Boulgr. in Blanford, Fauna Ind. Refit, and Batrach., 1890, 



p. 401 ; and Cat. Brit. Mus., 1896, iii, p. 273. 

 Wall and Evans in Journ. Bomb. Nat. Hist. Soc, xiii, p. 348 ; 

 Wall, in Spot. Zeylan., Augt., 1907, p. 166. 

 ? t) nigrocinctus, Jan, Icon. Gen. 1872, 41, pi. ii, fig. 2. 



„ robusta, Giinther, loc. c'it., p. 364, in part. 



)} ,, Fayrer, Thanat. Ind., 1874, pi. xxi. 



Distira robusta , Boulgr. in Blanford, Fauna Brit. Ind. Rept. and Batrach. , 1890 , p. 409. 

 ,, ,, Sclater, List Snakes Ind. Mus., 1891, p. 65. 



Wall and Evans in Journ. Bomb. Nat. Hist. Soc, xiii, p. 615. 

 ,, Wall in Mem. As. Soc. Bengal, 1906, p. 290. 

 ? Hydrophis rappii, Jan, loc. cit., 41, pi. iv, fig. 1. 



? temporalis, Blanford in Proc. Zool. Soc. Lond., 1881, p. 680, and fig. 



? ,, bishopii, Murray, Vert. Zool. Sind, 1884, p. 391, and pi. 



subcinctus, Gray in Zool. Misc., 1842, p. 63; and Cat., 1849, p. 52. 

 } , ,, Giinther, loc. cit., p. 368, pi. xxv, fig. F. 



,, melanocephalus, Gray, Cat., 1849, p. 53, in part. 



,, Boulgr., Cat. Brit. Mus., iii, p. 283, and pi. xv. 



,, melanosoma, Giinther, loc. cit., p. 367, pi. xxv, fig. E. 



Distira melanosoma, Boulgr., Cat., 1896, iii, p. 291. 

 ,, brugmansii, Boulgr., Cat., 1896, iii, p. 292. 



Wall in Proc. Zool. Soc. Lond., 1903, p. 96; and in Spot. 

 Zeylan., August, 1907, p. 169. 

 Hydrophis alcocki, Wall in Mem. As. Soc. Bengal, 1906, p. 288, pi. xv, fig. 3. 

 flowed, Boulgr. in Proc. Zool. Soc. Lond., 1898, p. 106, and plate. 

 ,, longiceps, Giinther , loc. cit., p. 375, pi. xxv, fig. O. 



Chitulia faseiata, Gray, Cat., 1829, p. 56. 



A B c 



Fig. 19. — Distira spiralis. 



Under this title I include six species considered distinct by Mr. Boulenger, viz., 

 brugmansii (Boie), subcinctus (Gray), melanocephalus (Gray), melanosoma (Giinther), 

 wrayi (Boulenger), ffoweri (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, 



