SYNOPSES AND DESCRIPTIONS. 



OPHIDIA. 



Brongniart, 1800. 



Vertebrate animals with elongate more or less cylindrical bodies, in 

 which head, neck, trunk and tail have the same axis; blood aerated in 

 lungs; bones of the head articulated by means of elastic ligament, which, 

 in the jaws especially, admits of considerable distention; limbs absent or 

 rudimentary ; without a movable eyelid or external evidence of ears. 



Not venomous ; 



no fold under the chin ; 



wormlike ; head and tail not distinct from the trunk ; 

 no claws at the side of the vent 



ScOLECOPHIDIA. 



a fold under the chin ; head more or less distinct ; 

 a claw at each side of the vent 



without claws or venom glands 



&•■ 



Onychophidia. 

 acacophidia, 



Venomous ; 



without claws ; head more or less distinct \ 



with venom-secreting glands and fangs 



TOXICOPHIDIA, 



Mem. — vol. 11 — 1 



