BoJrachtans and Reptiles from Colombia. 521 



A single male specimeiij taken from the stomach of a bird 

 at San Antonio. 



Oreosaurus Imvis. (Fig. 5.) 



Head rather elongate, snout pointed ; body moderately 

 elongate, Fronto-nasai quadrangular, much longer than 

 broad, as long as the frontal ; frontal pentagonal, as broad 

 as the fronto-nasal in front, narrower behind ; fronto-pariotals 

 shorter than the interparietal, which is hexagonal and much 

 narrower than the parietals j a pair of occipitals ; four supra- 

 oculars ; a loreal ; a row of large infraorbitals ; temple 

 shielded; six upper and four lower labials; chin-shields, one 



Oreosaurus Icevis. a, upper view of head ; h, side view of head ; 

 c, lower view of head ; d, aual region. 



anterior and three pairs, the two first pairs forming a suture 

 and followed by large gulars which, further back, form six 

 transverse series ; collar-shields six. Dorsal scales smooth, 

 quadrangular, twice to twice and a half as long as broad; 

 lateral scales small, flat granules ; 34 scales, including ventral 

 plates, round the middle of the body, 37 from occiput to base 

 of tail. Ventral plates large, in 8 longitudinal and 19 

 transverse rows. Pra^anal plates five, two in front, three 

 behind. Scales on the limbs smooth, except on the upper 



