SYNOPSES AND DESCRIPTIONS. 



OPHIDIA. 



Bromgnvtrt, 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 



Onychophidia. 



without claws or venom glands 



ACACOPHIDIA. 



Venomous ; 



without claws ; head more or less distinct ; 



with venom-secreting glands and fangs 



Tqxicophidia. 



Mem.— vol. ii — I 



