300 S A U R I A. 



more or less elongated. Back covered with granules and tubercles. 

 Abdomen scalj. 



Syju. —Discodactylus, Fitz. Sjst. Kept. 1, 1843, 95.— Tsoh. Faun. Peruan. 1845, 38. 



Observ. — The species of this genus are still united with those of 

 Phyllodactylas by some modern writers. If the generic characters 

 attributed to them are constant, there is no reason why Discodactylus 

 should not be adopted. 



Discodactylus phacophorus, Tsch. 

 (Plate XXV, figs. 25-32.) 



Spec. Char. — Upper surface of head granular. Two small, internasal, 

 tubercular plates, not contiguous upon the medial line of the rostrum. 

 Mental shields small. Twelve dorsal series of small tubercles : six 

 on either side. Ground color olive-green, above marmorated with 

 black ; beneath lighter, and unicolor. 



Syn. — Discodactylus phacophorus, Tsoh. Faun. Peruan. Herp. 1845, 38. 



Descr. — The species is apparently one of small size : the largest 

 specimen which we have examined measuring but one inch and three- 

 fourths, from the tip of the snout to the vent : the tail being about 

 equal to the head and trunk combined. The head is proportionally 

 large, elongated, depressed, tapering anteriorly into an acute, triangu- 

 lar, wedge-shaped snout. The neck is somewhat contracted, and the 

 body depressed, convex above, and flat beneath. The upper surface 

 of the head is subdepressed along its middle, and granular, more 

 coarsely so than the body. Upon the region in advance of the eyes, 

 the granules are larger still than on the occiput, interocular region, 

 and temples. The nostrils are lateral, situated just above the com- 

 missure between the rostral plate and first labial; and, superiorly, 

 upon the internasal space, may be seen two small, tubercular plates, 

 one above each nostril, and contiguous to the rostral plate, but 

 sometimes separated from each other upon the middle region of the 

 snout, especially in the adult. Immediately behind the nostrils, are 



