*94-] 



Allen, The Tamandua Anteaters. 



397 



MEASUREMENTS 1 OF 20 SKULLS OP Tamandua teiradactyla instabilis. 



1 Explanation of Measurements. 



Occipito -nasal length = front edge of nasals to most projecting part of occipital plane. 



Basal length = front edge of maxillaries to posterior border of occipital condyles, the premaxillaries being 

 usually detached or wholly lacking in museum specimens. 



Antorbital breadth = greatest breadth at front edge of orbits. 



Width across bullae = distance between outer edges of bullae. 



The letters y., m., and o., placed before the sign for sex, refer to age, and mean, respectively, young, middle- 

 aged, and old. 



Sex determined as explained in the preceding table of external measurements. 



