SYNOPSES AND DESCRIPTIONS. 



OPHIDIA. 



BrongnkiH, 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 cyelitl or external evidence of cars. 



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 



Onychophidia. 



without claws or venom glands 



ACACOPHIDIA. 



Venomous ; 



without claws ; head more or less distinct ; 



with venom-secreting glands and fangs 



TOXICOPHIDIA, 



Mem. — VOL. II — 1 



