CROrODILTANH, LIZARDS, AND SNAKES. 



399 



The plates on the upper surface of the liead are all conspicuously and 

 strongly rugose or ^^ rinkled longitudinally. The cephalic plates, how- 

 ever, do not appear to differ materially from those of S. f/racwsm. The 

 occipital is large and suhtriangular, with three nearly equal plates on 

 each side, the anterior pair in contact. Next comes one median plate, 

 then two, then three, but with a small plate between the two series 

 and surrounded by the five composing them. The six large supra- 

 orbitals are bordered internally by one row and externally by two of 

 small plates. 



rig. C7. 



SCKLOPORUS VAKIABILIS WlEGMANN. 



X?. 



Cat. No. ISfi.Vi, U.S.N.M. 



The scales are all very minute, nuich larger on the body than tail, 

 scarcely largest above, those on the throat being scarcely distinguish- 

 able. There are at least seventy in a series around the middle of the 

 body and about eighteen between the axilhe beneath. Those above 

 and on the sides are very distinctly keeled and angular, with a decided 

 mucro and lateral notch. The belly and chin scales have all a decided 

 central notch but no carination, aiul tlie scales on the inner face of the 

 tibia and postanal space are perfectly smooth. The hind feet are very 

 long, the free part of longest toe eciualing the head from nose to end 

 of large occipital plate behind and nearly to ear. There are eleven 

 or twelve femoral pores. 



