244 



BOID.i;. 



Family III. BOIU^. 



Maxillaries, palatines, and pterygoids movable ; transpalatine 

 l)rdseut ; pterygoids extending to quadrate or mandible ; supra- 

 temporal present, attached scale-like to the cranial walls, suspending 

 quadrate: pra?frontals< forming a suture with nasals. Mandible 

 \A'ith coronoid bone. Teeth in jaws and on palate. Vestiges of 

 pelvis, formed of four elements, viz. ilium, ])ubis, ischium, and 

 femur ; the latter usually terminating in a claw-like spur a isible 

 on each side of the vent. 



pm 



ang 



B 



c.a. q 



Fig. 73.— Skull of I'ythoH rclkulatus. 

 A. Upper view. B. Lower view. 



'pf. Pterygoid. 



'j)tf. Postfrontal. 



(J. QuadraLe. 



•so. Supraoccipital. 



»jr. Supraorbital. 



Iff. Siiprateniporal. 



Ij). Transpalatine. 



r. A^oiuer. 



This family, which includes the largest fSnakes, is represented 

 all over the hotter parts of the globe. It may be divided into 

 three subfamilies : — 



1. Fijthonince. Pra3maxillary teeth and supraorbital bone present. 



2. Chonch-ojyi/tJionince. No priemaxillary teeth; a supraorbital 

 bone. 



3. Boince. No prsemaxillary teeth ; no supraorbital bone. 

 The first and third are represented in India. - - - ■ 



