PLATE XV. 
'ig. Page 
] . Palwomastodon leadtielU, Andrews ; left ramus of mandible, upper and 
(1 a) outer views : one-third nat. size. Fluvio-marine beds (Upper 
Eocene). [-l-ypc specimen, C. 10014.] 100 
-. Ditto ; fragment of left maxilla with greatly worn m. 2 and m. 3, palatal 
view: one-third nat. size. Same horizon. [C. 10014 a.] 151 
Ditto; atlas vertebra, front view : one-third nat. size. Same horizon. 
[C. 10060.] 144 
surfaces for occipital condyles, 
i., socket of incisor. 
///. 1-11, molars. 
w./., mental foramen, 
m.r., maxilla, 
vt.c., neural canal. 
H.ij)., neural spine. 
od., socket for odontoid j)rocess. 
2 >aL, palate. 
pm. 11-4, preiuolars. 
sym., symphysis of inaudible. 
i.p., transverse process. 
V.C., vertebrarterial canal. 
base of zygomatic process of maxilla. 
