Diameter of crown of I 

 Diameter of crown of I 



254 VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 



Measurements. 



mm. 



tv - , (anteroposterior; 29 



Diameters <>1 superior molar crown < , r oli 



1 ( transverse ; o2 



Anteroposterior diameter of complete series of superior molars of 



median size ; 



pm. 3 ; 24 



pm. 2 ; 23 



pm. 1 ; 24 



m. 1 ; 26 



m. 2 ; 30 



m. 3 ; 29 



Total ; 181 



Length of six inferior molars (last not erupted) ; 137 



Length of pm. 3 of same set ; 25 



Depth of ramus of " " at m. 1 ; 55 



Length of symphysis mandibuli to base of crowns of incisors of another 



animal ; 98 



Width of same at narrowest point ; 40 



' transverse on edge ; 13 



vertical within ; 14 



transverse on edge ; 12 



vertical within ; 10 



Width of crown of I-g ; 7 



{anteroposterior (greatest) ; 64 



transverse at trochlea ; 49 



" at head ; 50 



Length of head from groove of trochlea ; 22 



Anteroposterior diameter of head (total) ; 30 



Transverse diameter of distal condyle of 3d metapodial ; 34 



Anteroposterior diameter of distal condyle at heel ; 26.5 



An imperfect mandible with deciduous molars and one permanent molar pro- 

 truded and one in the jaw, found by Mr. Mercer in the bottom deposit of the 

 Lookout Cave in East Tennessee, agrees with the species in the two characteristics 

 mentioned, but is not larger than T. terrestris. 



EQUUS Linn. 



Remains of a larger and smaller horse were obtained by Mr. Wheatley at Port 

 Kennedy in 1871, and fine series of the dentition have been recently procured by 

 Messrs. Rhoads and Mercer. The determination of the specific characters of the 

 extinct species of Equus is not easy, and I have taken advantage of every oppor- 

 tunity to obtain light on their characters. I published a preliminary table in 

 1884, 1 and later, in 1893, 2 pointed out the characters of additional species. 

 Finally, in 1895 3 , I added fuller descriptions of other species. I now give a brief 



1 Proc. Am. Phil. Soc, p. 10. 



- Report Geo Survey, Texas, Vertebrate Paleontology, pp. 6fi-83. 



3 Proc. Am. Phil. Soc, pp. 463-4. 



