PLATE T. 



Heads of Cnciiiidophorus Jcinniscalus W-^^'Jci (type) and typical C. 

 leuiniscatus from British Guiana (Univ. of Mich. No. 4759J), 

 showing the differences in tlie relative width of the parietal scales. 

 In the specimen of C. I. gcifjci the outer parietal scute is separated 

 from the large postorbital scale on the angle between the parietal 

 and temporal regions by one scale, while in the specimen of C. 

 Icinniscatns these scales are separated b}' several rows of small 

 scales. 



