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 eyclid 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 elands 
ACACOPHIDIA. 
Venomous; 
without claws; head more or less distinct; 
with venom-secreting glands and fangs 
TOXICOPHIDIA. 
Mem.—vou. 1—1 
