1910.] 



Primitive Characters of the Marsupial Skull. 



219 



ptyStj. 



fstni/sbSf 

 /con. '/If. ^ 



p.oFr 



fsbSf 



pty.Sj 



or.Pal. \fplp.e. 



fy^^'iyfet'x/p'ol. 

 ntasJr 



con 



Fig. 16. Skull of Marmosa simonsi. A, side view, with lower jaw. B, palatal view. 

 U. S. Nat. Mus. No. 121155. X f. 



f.pl.a, anterior palatine foramina. 



fen. pal, palatal vacuities. 



f.pal.p.e., postero-external palatine foramen. 



f.l.a., foramen lacerum anterius (sphenorbi- 



tal fissure). 

 f.r., foramen rotundum. 

 can.tr., transverse canal. 

 f.car., entocarotid foramen. 

 f.eus.. Eustachian opening. 



ty. As., bullate portion (tympanic process) of 



alisphenoid. 

 gl. As., glenoid portion of alisphenoid. 

 /. m. po., posterior mental foramen. 

 f.p.z. post zygomatic foramen. 

 ?/. car. post., ?posterior carotid foramen. 

 /. St. m., stylomastoid foramen. 

 /. p. m., postmastoid foramen. 

 f.c., condylar foramina. 



Other abbreviations as in preceding figures. 



