HERPETOLOGY OF JAPAN. 



167 



than half the distance between eye and tip of snout; ear-opening 

 small, oval, less than one-half the diameter of the eye; eleven upper 

 labials; mental pentagonal, scarcely larger than the adjacent lower 

 labials; nine lower labials; behind mental a pair of median, some- 

 what elongated cliin-shields, on either side of which another similar 

 shield of about the same size ; beliind these several polygonal smaller 

 shields; whole upper surface covered with granules, those on the 

 snout considerably larger; among the granules, from the eyes back- 

 ward to the root of the tail, numerous small, rounded tubercles, their 

 mutual distance averaging about one-half the diameter of the eye, 

 not arranged in regular longitudinal series, though about twelve 

 tubercles can be counted in a line across the back; upper surface of 



162 



Figs. lRO-163.— Gekko japonicus. 2 X nat. size. 160, top of head; 161, side of head; 102, chin; 



163, UNDERSIDE OF FOOT. No. 17521, U.S.N.M. 



limbs covered with granules like the back ; lower surface of body and 

 limbs covered with imbricate scales except on the tlu"oat and anterior 

 portion of neck, which are covered with granules of the size of those 

 on the back; first toe with 9 lamellae, fourth with 15 underneath; 

 second, tliird, and fourth toes connected by a basal web; an angular 

 series of six preanal pores (by an anomaly two inner pores on left side 

 not developed) ; base of tail swollen, with a single large tubercular 

 scale on each side; tail suddenly tapering from the basal swelling, 

 slightly depressed, oval in section, covered above with small scales, 

 the annular arrangement of which is chiefly marked b}^ the straight 

 posterior outline of every ninth row, and a pair of median tubercles 



