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Show 1881.] LIZARDS FROM ECUADOR. 231 but narrower. Sides of the neck and shoulder granular. Ventral shields smooth, in eight longitudinal series, long, narrow, and distinctly rounded posteriorly. Four principal prseanal shields-two median, with their points touching, and two lateral. Tail continuing the scutellation of the back and ventral surface, with a distinct groove along the side. Second and fifth .toes on fore foot nearly equal; fourth a little longer than the third. Brown, variegated with black on the head, with close longitudinal series of light black-edged ocelli or of light spots, in a black longitudinal stripe on the back and sides of the body. Labials and chin-shields spotted with black. Tail pale yellowish brown. Entire undersurface yellowish. millim. Total length 114 Distance from tip of snout to ear-opening. . 10 ,, „ „ fore limb .. 18 » „ „ vent 43 Length of fore limb 11 „ fourth front toe 3 „ hind limb 18 ,, third hind toe 4 „ fourth hind toe 6 This species has the dorsal scutellation characteristic of the subgenus Pantodactylus ; but, as before remarked, the dorsal scales are still narrower than in Cercosaura schreibersii, and more like those of C. argulus, Peters, figured in 'Abh. Ak. Berl.' 1863, pi. i. fig. 3. The narrow rounded ventral scales are a peculiar feature ; and so also is the arrangement of the parietal head-shields, which is like that of the genus Leposoma. One specimen from Canelos. CERCOSAURA, subg. n. PRIONODACTYLUS. Characters of Cercosaura and of the section Pantodactylus. Toes of both fore and hind feet strongly toothed beneath. 5. CERCOSAURA (PRIONODACTYLUS) MANICATA, subg. et sp. nn. (Plate XXII. fig. 3.) A single broad internasal, two fronto-nasals in contact, the rest of the plates on the upper surface of the head as in C. schreibersii, the interparietal being somewhat shorter. A single frenal, a large triangular prseocular over the labials, and another similar cauthal plate before the supraorbitals. Six supralabials, the third, fourth, and sixth elongate, continued in a series of longish smooth plates in the same line as far as the ear-opening ; only four infralabials, the third extremely elongate. A single broad mental plate behind the symphysial, followed by two pairs of contiguous posterior plates, a third pair being widely separated and forced into a lateral position by two converging groups of large oval gular scales, the central and lateral gular spaces being occupied by smaller rounded scales ; a |