426 Bulletin American Museum of Natural History. [Vol. XX, 



MEASUREMENTS J OF 8 SKULLS OF Tagassu torvum, FROM 

 SANTA MARTA, COLOMBIA. 



MEASUREMENTS x OF 10 SKULLS OF Tagassu tajacu, FROM 

 CHAPADA, BRAZIL. 



1 Explanation of Measurements. 



Total length front edge of premaxillaries to edge of occipital crest. 

 Basal length inner base of incisors on the midline to posterior border of condyles. 

 Zygomatic breadth at most expanded part of zygomatic arch. 

 Postorbital processes between extreme external points. 



Depth of occiput top of occipital crest on median line to lower posterior border of 

 basiocciptal. 



Rostrum width in front of canines. 



M 2 length of crown on median line x greatest breadth of tooth. 

 Middle upper incisors transverse breadth of alveolarline. 

 Bulla greatest length x greatest width 



