VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 261 



There are no definite characters by which I can distinguish two species of 

 peccaries in the superior molars in the Port Kennedy series ; nor can I distinguish 

 these from the superior molars of M. pennsylvanicus so far as they are known. 

 The latter include only the pmJ- and m 1 . As the temporary dentition of the type 

 specimens of M. pennsylvanicus is still in place, I had to extract the crown of the 

 pm 1 from its place above the d- 3 -. All the superior premolars differ from the inferior 

 premolars of the M. pennsylvanicus type in the absence of paraconule. They can be 

 distinguished from these and from the inferior premolars of M. tetragonus in the 

 greater size and thickness of the anterior cingulum. 



There is one set of superior molars of both sides of one individual, lacking 

 only the pm- 2 - of one side, accompanied by a superior canine. There are four 

 superior true molars and canine, and two superior premolars of a second animal, 

 and two inferior premolars with superior canine of a third individual. The third 

 (anterior) premolar is more complex than in any peccary known to me, including 

 M. nasutus. It has four principal cusps in pairs, but the anterior cingulum and 

 talon are so large as to be easily reckoned as cusps. They send outward each a 

 strong cingulum, but these are not continued on the external base of the crown. 

 No central cusps. The crown as a whole is longer than wide. In M. nasulus this 

 tooth is as wide as long, and has three cusps and a strong anterior cingulum. In 

 the succeeding premolars the anterior and posterior cingula are well developed, and 

 the anterior rises into a median tuberosity. The posterior sends a process anteriorly 

 on the middle line to the metaconule. In the first and second true molars the 

 anterior and posterior cingula are well developed, but the anterior does not develop 

 a median tubercle while the posterior does develop a median tuberosity. The last 

 true molar is built on the plan of a premolar. The anterior cingulum develops a 

 tubercle and the metaconule is joined by a median posterior tubercle. Posterior to 

 this is the true talon, a strong wrinkled transverse cingulum. 



The canine is much more slender in both crown and root than that of Dicotyles 

 labiatus, and it resembles in this respect M. pennsylvanicus. 



Measurements. 



mm. 



tv (anteroposterior; 11 



Diameters, pm. o { , L , , , , n 



1 | transverse (greatest) ; y 



-rv ( anteroposterior ; 13 



Diameters, pm. A < , r -, ■, 



' l { transverse ; 11 



tv t (anteroposterior; 15.5 



Diameters, pm. 1 < , l ' -, 



' i ( transverse; lo 



tv x i ( anteroposterior; 16.5 



Diameters, m. 1 { , l ' -, r 



7 tvflnavurup • r» 



transverse; 15 



> j anteroposterior; 17.5 



J ( transverse; 15.5 



, ( anteroposterior; 21 



Diameters, m. '. 



TV x o J 



Diameters, m. o < , L -, 



{ transverse ; 



f length of crown ; 



Diameters, superior canine < anteroposterior at base of crown ; 



( transverse at base of crown ; 



