25. OREOSAURUS. 411 



edge of the collar. Forty-three scales from occiput to base of tail. 

 Ventrals in ten longitudinal and twenty-two transverse series. Ten 

 to twelve femoral pores on each side. 



millim. milJim. 



Total length 188 From end of snout 



Head 23 to vent 92 



\Yidth of head 11 Fore limb 27 



From end of snout to Hind limb 37 



fore limb 34 Tail (reproduced) . . 96 



Venezuela. 



3. Oreosaiirus striatus. 



Ecpleopus (Oreosaurus) striatus, Peters, I. c. p. 201, pi. iii. fig. 2. 



Head short, body and limbs moderate. Frontonasal quadrangular, 

 as long as broad ; iroutal pentagonal, narrower than the frontonasal ; 

 parietals and interparietal subequal in size, the latter hexagonal ; a 

 pair of occipitals ; four supraoculars ; no loreal ; a row of large 

 infraorbitals ; temple shielded ; five or six upper and four or five 

 lower labials ; chin-shields, one anterior and three pairs, the two 

 first pairs in contact ; nine or ten transverse rows of scales between 

 the chin-shields and the edge of the collar ; collar-shields eight. 

 Dorsal scales quadrangular, keeled, about twice as long as broad ; 

 lateral scales smaller, convex, subgranular ; thirty-five scales round 

 the middle of the body, ventrals included ; thirty-five scales from 

 occiput to base of tail. Yentrals large, quadrangular, in eight or 

 ten longitudinal and twenty-three transverse series. [Males with 

 six femoral pores on each side.] Caudal scales like those on the 

 body. Light brown above, with a yellowish band on each side 

 commencing from the supraciliary region, bordered on each side 

 by a dark line ; a more or less distinct dark median band ; lower 

 surfaces whitish, black-spotted. 



millim. millim. 



Total length 82 From end of snout to 



Head 7-5 vent 33 



AVidth of head 4-5 Fore limb 9 



From end of snout to Hind limb 12 



foro limb 12 Tail 49 



8ta Fe de Eogota. 



rt. Ilgr. Bogota. 



4. Oreosaurus petersii. 



Ecpleopus (Oreosaurus) petersii, Boettyer, Jahresh. Offenh. Ver. Nat. 

 xvii.-xviii. 1879, p. 9, pi. i. fig. 2. 



Head very short ; body elongate ; limbs short. Interparietal very 

 large, seven-sided ; three occiintals, median smallest ; three supra- 

 oculars ; no loreal. Scaling otherwise as in 0. striulus. Thirty- 



