NATURAL SCIENCES OF PHILADELPHIA. 99 



In. Lin. 



Totallen^th of adult 14 6 



Length to vent 4 7 



" axilla . 2 1 



" to most posterior part of head shield 1 3 



" to anterior margin orbit V 



Width at prefrontal angle 4.5 



" at nostrils , 2-5 



" at angles mandibles... 9'5 



Length fore limb 1 10-5 



" hand 8-75 



" hind limb 3 7.1 



" tibia 1 1-5 



" foot 10- 



Specimens of this species (No. GG38) from the Napo or Upper Amazon of 

 Equador. 



Ameiva petersii Cope, sp. nov. 



Ventral plates in ten series ; heel without horny tubercles. Two series of 

 plates on under surface of tibia ; frontal plate undivided, four supraorbitals. 

 Inner toe longer than outer, both short. Brachial shields in three rows just 

 continuous with the two series of antebrachials. Two pairs of parietal plates. 

 Gular scales considerably larger on the middle of the posterior border ; median 

 scales of posterior fold larger than marginal. Preanal ])lates scale-like, small, 

 two larger in the centre. Dorsal scales minute, keeled ; interparietal plate 

 wider than parietal, frontal narrowed behind ; prefrontals well in contact ; one 

 large loreal. Postmental plate longer than wide, infralabials five continuous 

 and three pairs posterior oblique. Numerous small plates b hind the parietals ; 

 caudal plates keeled. 



Color bright olive, with a narrow yellow band from below orbit to groin, 

 banded above by a broad black band, which is marked by several white dots 

 behind the scapular region, and is bounded above in front by a pale green line 

 to orbit. A narrow dark band from below orbit to groin below the yellow. 

 Sides blnckish and pale s|)otted. The only specimen being young, the colora- 

 tion of the adult is probablj' nearly uniform green. 



In. Lin. Lin. 



Total length 4 10-5 Length fore limb 8 6 



Length head and body 19 " hind limb 17 



" to edge parietal plates 6 " foot 9-5 



" " orbit 2-5 



No. , from the Napo or MaraSon. 



The species is nearest A. la e ta Cope, but is quite different in the preanal 

 and parietal plates and gular scales. It is dedicated to Prof. Wilhelra Peters, 

 of the Friederich Wilhelm's University of Berlin, who has added much to Her- 

 petology. 



Teids teguexim Gray. Tupinamhis Daud. 

 One sp. (G644) from Napo or Upper Amazon. 



ECSPONDYLUS STRANGITLATUS Cope, Sp. nOV. 



This species is very distinct from others described, in the alternation of the 

 dorsal transverse series of scales, the minuteness of those of the sides, nape 

 and gular region, and in the constriction of the neck. 



The general form is slender, the body not depressed, the tail of moderate 

 length and considerably compressed. Neck much compressed, head elevated, 

 flat above, muzzle short, compressed Rostral truncate behind, internasal sub- 

 quadrate, broad as long, frontonasals longer than broad. Frontal narrower, 

 frontoparietals elongate ; interparietal longer than broad, convex lieliind and 

 projecting beyond parietals. Parietals one pair, in contact with supraorbitals, 

 broader than long. Four well marked supraorbitals, without surrounding 

 granules; five superciliary plates, posterior not smaller. Two loreals, the 



1868.] 



