HERPETOLOGY OF JAPAN. 



301 



Soc. London, 1903, p. 94 (Hongkong). — Enhydris plumbea Stejneger, 

 Journ. Sci. Coll. Tokyo, XII, Pt. 3, 1898, p. 222 (Taipa, Formosa). 

 1834. Hypsirhina hardwickii Gray, 111. Ind. Zool., II (pi. lxxxvii, fig. 1) (type- 

 locality, Pinang; type in Brit. Mus.). 



Description. — Adult female; Science College Museum, Tokyo, No. 11a ; 

 Taipa, Formosa; November, 1S97; T. Tada, collector (%s. 260-262). 

 Rostral much broader than high, just visible from above; internasal 

 single, twice as wide as long, separated widely from rostral by nasals, 

 separated from loreal ; prefrontals broader than long, broadly in con- 

 tact with supraocular; frontal longer than its distance from tip of 

 snout, equaling interparietal suture, nearly straight anteriorly, sides 

 parallel, twice as wide as supraocular at center of e3^e; parietals as 

 long as their distance from rostral, rather narrow posteriorly; nostrils 

 small, round, on upper surface of snout, in the posterior margin of the 

 anterior nostrils which are broadly in contact behind the rostral ; pos- 

 terior nasal less than half the size of the anterior, smaller than 



Figs. 260-262.— Enhydris plumbea. 2 X nat. size. 260, top of head; 261, side of head; 262, under- 

 side OF head. No. 11a, Sci. Coll. Tokyo. 



loreal, which is slightly longer than high; eye small, its diameter less 

 than its distance from edge of lip ; one preocular, not in contact with 

 frontal; two postoculars; temporals 1+2; 8 supralabials, increasing 

 in height backward to the seventh, which is largest, and much higher 

 than eight, first in contact with loreal, separating posterior nasal from 

 second supralabial, fourth and fifth entering eye; five lower labials in 

 contact with anterior chin-shields; posterior chin-shields slightly 

 shorter than anterior, separated from each other by two scales; 19 

 rows of smooth scales without apical pits; 130 ventrals; anal divided; 

 31 pairs of subcaudals. Color (in alcohol) above uniform slate gray; 

 labials and two outer scale rows whitish with gray edges; underside 

 whitish, each scute with lateral edge and base narrowly margined 

 with dark gray and with a median basal spot of the same color; on 

 anal shield and the underside of the tail a sharply defined jnedian, 

 line of dark gray. 



