PLATE V. 



Kg. Page 



1. Arsinoitherium zitteli, Beadnell ; upper incisor (or canine), crown and 



(1 a) lateral views : two-thirds nat. size. Fluvio-marine beds (Upper 

 Eocene). [M. 8470.] 20 



2. Ditto; right upper premolar, probably the third, crown view: two-thirds 



nat. size. Belonging to same individual as last. [M. 8470.] 20 



3. Ditto ; left upper premolar, probably the second, crown and (3 a) anterior 



views : two-thirds nat. size. Belonging to same individual as last. 



[M. 8470.] 20 



4. Ditto ; left lower molar, crown and (4 a) outer views : two-thirds nat. size. 



Belonging to same individual as last. [M. 8470.] 23 



5. Ditto; left milk-molars 2-4, crown and (5 a) outer views: two-thirds nat. 



size. Same horizon. [M. 8471.J 21 



6. Ditto; third left upper molar, only slightly worn, crown, (6 a) inner. 



(6 b) outer views : two-thirds nat. size. Same horizon. [M. 8470.] 17 



7. Ditto; third right upper molar, more worn than last, crown view: two- 



thirds nat. size. Same horizon. [M. 8804.] 17 



8. Ditto ; right upper molar, greatly worn, crown and (8 a) inner views ; iu 



the latter the roots are shown : two-thirds nat. size. Same horizon. 



[M. 8804 a.] 17 



a.c, anterior column of molars. 

 ae., antero-external cusp. 

 ai., antero-internal cusp. 

 a.r., anterior root, 

 c, cingulum. 



c.', postero-internal portion of cingulum. 

 dm. 2-4:, second, third, and fourth milk-molars. 

 m.r., middle root. 



ms., mesostyle. 

 p.c, posterior column of molars. 



2}e., postero-external cusp. 



pi., postero-internal cusp. 

 p.r., posterior root. 



ps., parastyle. 

 ic., inner face of tooth. 



