HERPETOLOGY OF JAPAN. 241 



flanks and stops at the i,a"i)in, and below tins another black stripe 

 from the upper edge of the subocular ; upper side of limbs with blackish 

 reticulations; supralabials obscurely marked with dusky; lower side 

 whitish. 



THvicnsinns. 



mm. 



Total length 207 



Snout to vent 57 



Vent to tip of tail 150 



Snout to collar 20 



Snout to posterior edge of occipital 13. 5 



Snout to ear-opening 13. 5 



Greatest width of head 8.5 



Fore leg 21 



Hind leg 31 



The female (U.S.N. M. No. 31841, same locality and collector) differs 

 in the tail tai)erin<i:; from the base which is not swollen; the hind legs 

 are also shorter, the tip of the longest toe of extended hind leg barely 

 reaches beyond the elbow. 



In the young (U.S.N.M. Nos. 13748, 13749, from snout to vent, 

 respectively, 20 and 24 mm.) the interparietal is relatively very large, 

 being as large as or larger than the internasal. 



Variation. — The numl^er of chin-shields, or submandibulars, seems 

 to be subject to less variation than almost an}^ other character, there 

 being four pairs in all the 66 specimens examined by me, except No. 

 31842, which has five irregular pairs, and No. 31889, which has only 

 three, but showing indication of fusion between the two anterior 

 pairs.** 



The number of inguinal pores is also very constant, all the 66 speci- 

 mens having two on each side. Only two specimens (Nos. 12714 and 

 31886) show indication of a third pore on one side, the scale next to 

 the outer pore on one side having a minute dusky spot. Doctor Guen- 

 ther states, however, that he has seen a specimen with three pores, 

 and if the figure of this species in Fauna Japonica '' is correct we have 



aBoulenger (Proc. Zool. Soc. London, 1899, pp. 161-162) lays stress upon an alleged 

 exception to the rule that T. septenlrionalis has three chin-shields only, as "not due to 

 fusion or accidental division, as shown by the figure (p. 162)." The figure quoted 

 shows a specimen with three chin-shields on one side and four on the other. The 

 reason why the abnormality is considered not due to fusion or division is evidently the 

 assymmefric arrangement, inasmuch as the suture between the second shield from 

 behind and the shield anterior to it on each side are not on a line with each other, the 

 assumption being that these sutures always correspond in normal specimens having 

 three or four pairs, respectively. Such is not always the case, however, as will he seen 

 from the accompanying figure from a specimen (No. 23530) Ijiouglil honH> by me from 

 Yokohama (fig. 212). If in this specimen the first two shields ou the left side were 

 fused the result would Ije exactly like the one figured by Bouleiiger (only reversed). 

 The abnormality in his specimen, therefore, may easily be due to division. 



'' Reproduced on Plate XVIII (fig. 2) of this work. 



26485— No. 58—07 16 



