17. PRIONODACTYLUs.—18. CERCOSAURA. 395 
along the middle of the back and the upper surface of the tail; a 
narrow whitish line along the upper labials to the arm-pit; a series 
of very small white ocelli surrounded by black rings along the side 
of the body, and a few on the limbs; a larger ocellus at the junction 
of the fore’arm and the chest ; lower surfaces lead-coloured, sprinkled 
with blackish. 
millim, millim. 
Total length............ 98 From end of snout to vent 33 
ead: os aneieuvacteiradiautes 9 Hore limbs vceas eee eas 12 
Width of head ........ . 55 Hindlimb ............ 18 
From end of snout to fore EBT fy paita-ges Ara. yoann ys ay 65 
itib .2ie ant ake yews 14 
Ecuador. 
a. Her. Intac. Mr. Buckley [C.]. (Type.) 
18. CERCOSAURA. 
Cercosaura, Wagler, Syst. Amph. P; 158; Wiegm. Herp. Mex. p. 10; 
Peters, Abh. Berl. Ac. 1862, p. 174. 
Emminia, Gray, Cat, Liz. p. 24. 
Cercosaura, part., Gray, l. c. p. 60. 
Tongue moderately elongate, arrow-headed. Lateral teeth com- 
pressed, bi- or tricuspid. Head with large regular shields; fronto- 
nasal separating the nasals; preefrontals and frontoparietals present ; 
nostril pierced in the middle of a single nasal. Eyelids developed, 
lower with a transparent disk composed of several scales. Ear 
exposed. Limbs well developed, pentadactyle. Dorsal scales large, 
subquadrangular, slightly imbricate, strongly keeled, arranged in 
regular transverse and longitudinal series; lateral scales small; 
ventral plates large, quadrangular, smooth, arranged in regular 
longitudinal and transverse series. An indistinct collar fold. Fe- 
moral pores few. Tail cyclotetragonal. 
Brazil. 
1. Cercosaura ocellata. 
Emminia olivacea, Gray, Cat. p. 24. 
Cercosaura ocellata, Gray, 1. c. p. 60. 
Cercosaura ocellata, Wagl. 1. v. ; Peters, 1. ce. p. 175, pl. i. fig. 1. 
Emminia olivacea, Gray, Proc. Zool. Soc. 1851, pl. vi. fig. 2. 
Cercosaura humilis, Peters, 7. c. p. 180, pl. i. fig. 2. 
olivacea, O’Shaughn. Proc. Zool. Soc. 1881, p. 228. 
Head depressed, body moderately elongate. Ear-opening large. 
The ordinary head-shields; interparietal large, longer than the 
parietals; two large lateral and a small median occipital; four 
supraoculars ; a loreal and a frenoorbital ; temples with large shields 
superiorly, scaly inferiorly ; six upper and four or five lower labials ; 
chin-shields very large, one anterior and four pairs, the first two pairs 
in contact on the median line, the two others separated by a row of 
