VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 259 



Some of the specimens formerly determined by myself as E. complicahis prob- 

 ably belong to E. fratemus pectinatus ; and individuals from Petite Anse, Louisiana, 

 referred by Leidy to the same species (under the name of E. major), I have shown 

 to belong to E. intermedins Cope. Leidy has regarded E. complicatus as the 

 species for which Dekay proposed the name of Equus major, and I have followed 

 him in previous papers without further inquiry. Having looked into Dekay' s 

 account, given in the first volume of the Natural History of New York, I find that 

 no definite application of his name of E. major can be made. No description is 

 given, and the localities referred to are those where E. complicatus, E. intermedins, 

 and probably E. fraternus are found. I have accordingly returned to the appropri- 

 ate name given by Leidy. 



MYLOHYUS Cope. 

 American Naturalist, 1889, p. 134. 



Like Dicotyles, but only two inferior incisors on each side as in Platygonus. 



Eighteen individual peccaries are represented by teeth in the present collection, 

 and there are numerous bones. Although there are no incisive regions sufficiently 

 well preserved to demonstrate the dental formula, the other characters are so like 

 those of M. nasutus and M. pennsylvanicus as to render their reference to the same 

 genus proper. 



Certain dental characters are common to both species of the genus. Thus, the 

 posterior pair of cusps of the premolars in both jaws is separated on the middle 

 line by the juxtaposition of the talon of the tooth with the metaconulid. This is 

 not the case with the true molars, excepting in the case of the third superior, where 

 the second pair of cusps is separated in the same way. The last true molars of 

 both jaws have besides a considerable talon. 



The dentition appears to refer the individuals to two species, which are of 

 about the same dimensions. 



Pm 1 with six or seven cusps ; inferior premolars without paraconulid ; inferior 

 canine with four planes, less compressed ; superior canines compressed at 

 base ; M. tetragon us Cope. 



Pm 1 with four cusps ; inferior dentition unknown ; superior canines robust and 

 subtriangular at base ; maxillary angulate ; M. nasutus Leidy. 



Pm 1 unknown ; inferior premolars with paraconulid ; inferior canine com- 

 pressed, triangular in section ; superior canines compressed, oval in section at 

 base ; maxillary flat ; M. pennsylvanicus Leidy. 



While the material shows that two species of Mylohyus left their remains in 

 the Port Kennedy deposit, the proper reference of all the specimens is not practic- 

 able as yet, and the identification with known forms is provisional. Thus, of the 

 supposed M. pennsylvanicus I have no certainly referable inferior canine, without 

 which the identification is uncertain. The proper reference of superior molars is 

 uncertain in both species. As M. nasutus was founded on an upper jaw only, 

 either one of the Port Kennedy species may be referable to it. 



