133 



kk 



:-. API. 



PLATE XIV.— Structural Characters Used in the Classification of Serpents. 



A. PI., Anal Plate (undivided at left, divided at right); D. Sc. Dorsal scales 

 (keeled at right, smooth at left); K. Keels on Scales; U, Urosteges or Tail- 

 'plates: V. PL, Ventral plates or Gastrosteges; 1st, 2nd, 3rd, etc., rows of scale, 

 showing order of counting. Drawn natural size under supervision of the Eco- 

 nomic Zoologist. 



