HERPETOLOGY OF JAPAN. 253 



the one at the upper anterior edge of the latter (the so-called tympanic) 

 larger than the others; six lower lal)ials on left side, five on right; 

 six pairs of submandibulars, or chin-shields, the last pair very small; 

 first two pairs of chin-shields in contact throughout, third ])air sepa- 

 rated posteriorly by a wedge of gular scales; back covered with 

 bluntly keeled, slightly imbricated scales, the length of six from the 

 middle of the back corresponding to the length of four ventral jjlates, 

 these dorsals becoming gradually smaller and nearly smooth on upper 

 neck and sides, al)out 30 in a row across the middle of the back be- 

 tween the ventrals; gular scales smooth, irregularly^ polygonal with 

 rounded corners, increasing in size backward toward the collar, which 

 consists of 10 large, smooth shields; fold behind collar covered with 

 granules and small scales; ventral plates in six longitudinal rows, the 

 two naedian rows narrower and the next row on each wider than the 

 outer series, which is bordered externally by a series of large flat 

 scales only slightly smaller than the median series of plates; plates 

 between the arms not in regular longitudinal rows, the series next to 

 the collar fold being oblique, lengthened, more or less pointed behind; 

 29 transverse rows of plates between collar and preanal plate; preanal 

 plate very large, smooth; arm with a series of large smooth plates 

 above the elbow and two below ; anterior and lower surface of femur 

 and tibia also covered with large smooth plates; eight pores on right 

 thigh, ten on left; scales covering underside of digits smooth; tip of 

 longest toe reaching wrist of fore leg; tail covered with squarish, 

 elongated scales, as long as the ventral plates, those on the upper 

 surface keeled, those on the basal half of the lower surface smooth. 

 Color (in alcohol) olive clay-color above with two dorsal series of small 

 whitish dots, each about covering one scale, edged on each side by 

 a dark brown dot of similar size; a lateral series is also indicated as 

 well as a few brown dots on the middle portion of the back; these 

 marks, rather better defined, continued on the tail; underside paler 

 olive gray, jjosterior ventrals obscurely marked with ])lackish, hind 

 legs and tail underneath more heavily marked with dusky. 



IHinensinns. 



mm. 



Total length (tail regenerated ) 106 



Snout to vent _. 57 



Snout to collar 17 



Snout to ear-opening 10 



Snout to posterior edge of oeciinlal 10 



Greatest width of head 8 



Fore leg 17 



Hind leg 24 



The adult male has relatively longer legs, especially hind legs, and 

 tail, the latter being nearly twice as long as the head and body in the 

 male, and only about one and a half times as long in the female. 



