8 University of Michigan 



pavement-like flat shields ; supraorbital semicircles each com- 

 posed of two rows of shields, the inner series of each semi- 

 circle separated from its fellow of the opposite side by two 

 rows of small, irregular shields ; occipital scale of irregular 

 oblong shape, about as large as ear opening, separated from 

 the semicircles by three series of rather large plates; supra- 

 ocular disks large, composed of eight or ten enlarged shields 

 in contact with scales of gradually diminishing size in the other 

 directions ; canthus rostralis rather obtuse, but sharply defined 

 by a straight linear suture separating the enlarged canthal 

 shields and the almost equally enlarged shields of the upper 

 loreal row ; four loreal rows below this enlarged upper series ; 

 the lowest row, however, bordering the supralabials, being 

 also much enlarged; eleven supralabials, nine inf ralabials ; 

 gular appendage large, pendulous, plicate, and covered with 

 non-imbricating, pavement-like scales similar to those on the 

 rest of the body ; body very strongly compressed, slender and 

 delicately formed, covered entirely with flat non-imbricating, 

 plate-like scales, so that all scales of head and body are undif- 

 ferentiated in their essential features, except that those of 

 the head are larger and polygonal, whereas on the rest of the 

 body they are rather small, more or less similar in size, except 

 that the ventrals are larger than either the laterals or the dor- 

 sals ; the dorsals tend to be round, the laterals are all more or 

 less oblong and the ventrals tend to be 1 hexagonal in shape; 

 the limbs are rather short, the adpressed hind limb reaches 

 just anterior to the shoulder; about forty lamallae beneath the 

 fourth toe; tail strongly compressed, the basal row of plate- 

 like scales on each side keeled, all the rest smooth. 



Color in life: Very light china bluish-grey, changing to 

 white in alcohol, the head, neck and dewlap all similarly 

 marked with a network of coarse black lines, two black sad- 



