1903.] Gregory, The Skortening of the Elephant's Skull. 39' 



the grinders and their alveolar pouch, have had a marked 

 effect on the relations of the bones and foramina of the 

 sphenoidal region: the obliquely placed external portion of 

 the orbito sphenoid (Fig. 2); has been squeezed into a long, 



Ma.-\- 



Fig. 2. Superior view of the same skull. From Osborn. Abbreviations as above ; also 

 i^a.— Lachrymal. .-J .»«.— Anterior nares. .\'rt. i^.—Narial sinus. 



thin process; internally (PI. xxiii) the anterior edges of the 

 basisphenoid are directed outward and backward ; both inter- 

 nally and externally the optic foramen, foramen lacerum an- 

 terius, and foramen rotundum, in the order named, are 



