PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 
EXPLANATION OF PLATE XIII. 
PAGE 
Nesodon imbricatus : Skull (No. 15,000) and mandible (No. 15,260) from the 
right side, X T M.a.e. = External auditory meatus. 
Pty. — Post-tympanic process of the squamosal. 
Mp. — Mastoid process. . . . . . 132 
(vol. VI.) 
