424 



REPORT OF NATIONAL MUSEUM, 1898. 



iiugular spine, the iufrarictal. The conic spine above mentioned is as 

 much opposite to this plate as to the infrahibials. On the neck two 

 short fokls, one above and posterior to the other, with three conic spines 

 on each. Three rows of enlarged gular scales on each side of the mid- 

 dle line, with conic apices directed externally; those of the external 

 row the largest, and followed by a few smaller spines on the gular fold. 

 Scales of top of head convex and obscurely roughened ; a transverse 



series of four conic scales in front of the base of th3 occipital horns, 

 and a similar one between the bases of the latter. Anterior and pos- 

 terior superciliary plates in contact, with a small '< keystone " below 

 their opposed apices. 



Dorsal pholidosis irregular. Medially the scales are flat and keeled, 

 but they become much smaller and graniform laterally, where they are 

 separated by smaller granules. A band of smaller flat scales, down 

 the vertebral line, bounded by larger scales on each side. External to 

 these there are four rows of well-separated, large, keeled scales, with 



