Fic. 20. VENTRAL VIEW OF THE SKULL OF THE 
ALLIGATOR (A. Mississippiensis). 
maxilla. 14. basioccipital. a, anterior 
jugal. palatine vacuity; eu, 
quadrate. opening of the median 
palatine. Eustachian canal; pn, 
pterygoid. posterior nares; pv, 
transpalatine. posterior palatine 
quadratojugal. vacuity. 
