HERPETOLOGY OF JAPAN. 437 



[Genus ENHYDRINA" Gray.] 



1834. Polyodontes Lesson, in Belanger'y Voy. Indcs Orient., Kept. (p. 325); 



Atlas, Rept., pi. iv (type, P. annulahis 1 1 not Polydontes Montfort, 1810, nor 



Pohjodonta Megerle, 1812). 

 1849. Enhydnna Gray, Cat. Sn. Brit. Mus.. p. 47 (type, Ilydnis ralakadyn). 



[ENHYDRINA VALAKADYN'' i Boiej.] 



Plate XXV. 



1827. Hydrux ralakadyn Boie, Isis, 1827, p. 554 (type-locality, Tranquebar, India). 



1827. Disteira russelil FiTziNfiER, Lsis, 1827, p. 733(l)ase(l on Russell's Ind. Serp., 

 II, pi. XI). 



1834. Polyodontes innulatus Lesson, in Belanger's Voy. Indes Orient., Rept. 

 (p. 325);' Atlas, Rept. pi. iv (type-locality, ). 



1837. Hydrophis schistosa Schlegel, Phys. Serp., II, p. 500; Atlas, pi. xviii, figs. 

 1-3 (not of Daudin, 1803). — Hydrophis schistosus Jan, Icon. Ophid., livr. 

 41, 1872, pi. II, fig. 1 c ("Japan;" Mus. Milano). 



1842. Hydrophis bengalcnsis Gray, ZooL Miscell., p. 62 (type-locality, Bengal; 

 type in Brit. Mus.; Hardwicke, collector). 



1842. Hydrophis subfasciata Gray, Zool. MLscelL. p. 62 (type-locality, Bengal; 

 type in Brit. Mus.). 



1849. Enhydrinn valakadyen Gray, Cat. 8n. lirit . Mus., p. 48 (emendation). 



1872. Hydrophis fasciatus Jan, Icon. Ophid., livr. 41, ]>!. in, fig. 2 (Bay of Ben- 

 gal) (not of Schneider). 



1890. Enhydrina valakadini Boulenger, Fauna Brit. India, Rept., p. 406 (emen- 

 dation); Cat. Sn. Brit. Mus., Ill, 1896, p. 302 (Persian Gulf to PapuasiaV 



1892. Enhydrina vikadien Boettger, Oi'fenl)ach. Ver. Naturk. 29-32 Ber., p. 89 

 {lapsus) f Madras). 



1899. Enhydrina velakadien Flower, Proc. Zool. Soc. London, 1899, p. 688 ilapsns) 

 (Siam). 



Tliis i.s ])ossibly the snake which von Siebokl meant when 

 mentioning ''Hydrophis fmn.ventris mihi," referring as he does to 

 Bosc's "Hydrophis ardoise " (Nouv. Diet. d'Hist., Nat., XV, p. 491). 

 The reference is found in a scarce pamphlet published by von Sie- 

 bokl in Batavia in 1824 under the title "De historiae naturalis in 

 Japonia statu," etc. A reprint in pamphlet form was issued in 

 Wuerzburg by some of his friends in 1826, and reference is also made 

 to it in Oken's Isis for 1827. From these latter two issues has been 

 taken the above reference, which is found on page 18 and page 142, 

 respectively, the heading under which it occurs being Spicilegia 

 Faunae Japonicae. 



There is no specimen in our museum from Chinese or Japanese 

 waters, and a detailed description of a specimen from a distant 

 locality is not deemed satisfactory. For the purposes of identifica- 

 tion a transcrij)t of Boulenger's diagnosis in his Catalogue of Snakes 

 is given. 



a Signifying like Enhydris, the generic name given liy Latreille 1o another water 

 snaki'. 



^Valakadyen is the native name according to Russell, its first de.scriber. 

 c Reproduced in this work on Plate XXV. 



