100 IGXTANID^. 



unicarinate, very feebly so on the back and sides, distinctly on the 

 belly ; the scales largest on the flanks, smallest on the middle of the 

 back. Limbs short ; the adpressed hind limb reaches the elbow in 

 the male, not so far in the female. Nine femoral pores on each 

 side. Tail twice or twice and a half as long as head and body, covered 

 with strongly keeled scales. Pale olive above, uniform or with 

 irregular angular black cross bands on the body ; black lines radiating 

 from the eye, the two most marked extending to the fore limb, the 

 lower passing through the tympanum. 



Total length 293 322 millim. 



Head 22 25 „ 



Width of head ..11 14 „ 



Body 66 92 „ 



Fore limb 31 39 



Hind limb 40 50 



?» 



>7 



Tail 205 205 „ 



Brazil ; Paraguay. 

 a-h, c, d. J 2 . Brazil. 



3. Polychrus gutturosus. 



Polychrus gutturosus, Berthold, Abh. Ges. Gotting. iii. 1847, p. 5, 



pi. i. fig. 1. 

 (Chaunola3mus) multicarinatus, Peters, 3Ion. Berl. Ac. 1869, 



p. 786 ; Bocourt, Miss. Sc. Mex., Rept. p. 112, pi. xvii. fig. 8. 



Snout obtusely pointed; nostril equally distant from the orbit and 

 the tip of the snout ; eye-opening a little larger than the tympanum ; 

 upper head-scales as in the preceding. Gular scales oval, striated, 

 much larger than veutrals, those on the gular pouch widely separated 

 by granules ; no denticulation. Scales on the body of nearly equal 

 size, the dorsals and laterals unicarinate, the ventrals tri- or quin- 

 quecarinate. Limbs moderately elongate, the scales mostly quinque- 

 carinate. Six to eighteen femoral pores on each side. Tail long, 

 round, covered with unicarinate scales. Olive-brown above, greenish 

 yellow inferiorly ; an irregular yellow band along the back of the 

 thighs ; tail with indistinct darker cross bands. 



Total length 153 millim. 



^& 



Head 35 



Width of head 22 



Fore limb 63 



Hind limb 78 



Tail 338 



Colombia : Costa Rica, 



5) 



