32(3 Tin: puerco fauna. 



The interior molars are ol robust proportions. Their sizes are, coni- 

 mencin<j with the largest: Pni. iv; M. ii : ^l. i: ^f. iii. The last molar is only 

 half as large as the j^enultimate. It has two anterior and an external lat- 

 eral tubercle and a heel. On the penultimate molar there are two anterior 

 tubercles with a trace of anterior inner; also a broad flat heel, with a low 

 tubercle on the external side. The constitution of the first true molar is 

 identical. The fourth premolar has a rudi mental heel, consisting of a low 

 tubercle only. The principal cusp is conic, and is over the middle of the 

 transverse diameter, and a little behind the middle of the anteroposterior 

 diameter. No cingula. Enamel nearly smooth. 



Meanurements. 



Masillarv bone. 



M. 



Length of base of P-m. iv, M. i,au<l M. ii 0175 



Diameters l.aso P-m. iv 5 ii'it^oposterior 005o 



< transverse 0065 



Diameters l.ase >,. i ^■'""^'"I"'^""""'' ^"^ 



I transverse 0070 



Diameters base M. jj U"««oposterior 0000 



( transverse 0(195 



Mandible. 



Length of bases of liist fonr molars I>.i50 



,-,•„. 1, ( anteroiiosterior Olt70 



Diameters P-m. iv / ' 



< t ransvcrse O0.t5 



Diameteis M. ; > •'"teroposterior ,. . AXm 



( transverse OOtiO 



T^. . _„ n ■•• $ anteroiiosterior OCW 



Diamrters M. in < ' 



( transverse tKi43 



Depth of nuuns at M. i 0115 



Thiekneas of ramus at M. i 00*."> 



Another specimen includes the last four superior molars. The third 

 true molar is even smaller than the corresponding inferior tooth would lead 

 one to suppose, the grinding face having about one-lifth the superiicial area 

 of that of the second superior molar. The fourth premolar has a little 

 greater transverse diameter than the first true molar. In anotlRr specimen, 

 which includes part of the skull with some superior molars, the third supe- 

 rior nii)lar is a little larger tiiaii in the last mentioned, displaying one 

 external and one internal tubercle In this specimen the second premolar 

 has a .sub-triangular base with binadly mnnded angles, and the crown is 

 .simple, with a conic apex. In tiir present species the characters c>f Mio- 



