264 VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 



grooves, together with the simplicity of the columns and valleys refer the genus to 

 the Camelidse, but the well-developed heel of the last inferior molar with its enclosed 

 valley is not met with in that family, but is usual in the Cervidge. Under the 

 circumstances I must leave the question of its position in doubt for the time being. 



Teleopternus orientalis Cope (PI. XXI, figs. 4, 4a). [Type No. 39, Mus. Acad. Nat. Sci. Phil.] 



This ruminant is represented by teeth of three individuals. One of these 

 includes two superior true molars (Nos. 1 and 2) ; the second, a last inferior molar, 

 and the third, a last superior molar. All belong to adult, but not old animals, of 

 about the size of the wapiti {Cervus canadensis). 



The superior molars of No. 1 were found in juxtaposition. These are the first 

 and second true molars ; the first, is possibly the last of the deciduous series. These 

 teeth are characterized by the incurvature toward the apex of the external wall of 

 both the paracone and metacone. The median external rib is well marked on both, 

 but that of the paracone is broader and less prominent. The ectostyle is very- 

 strong, and is followed posteriorly by a deep groove. The parastyle is also strong, 

 while the metastyle is weak. Both molars are wider anteriorly than posteriorly, 

 and the difference is most conspicuous on the m 1 , where also the protocone is con- 

 siderably lower than the hypocone. Enamel entirely smooth. 



Measurements. 



mm. 



( anteroposterior ; 20 



Diameters of mJ-^ transverse at paracone (base) ; 10 



( " at metacone (base) ; 14 



| anteroposterior; 23 



Diameters of m- 2 -'-* transverse at base of paracone ; 19 



( " "of metacone; 17 



The last inferior molar (of the right side) is that of an older individual than 

 the one last described, as it is more worn. It is moderately hypsodont, and the 

 columns are deeply separated to their bases. Their internal walls have the same 

 gentle curvature outward that the superior molars display in the opposite direction, 

 and they are convex with a tendency to median angulation in the transverse section. 

 The posterior column is smaller than the other two but both its crescentic plates are 

 well developed, and they join posteriorly, closing the lake. The internal crescents 

 are lower than the external, and their horns join the latter. There is a very weak 

 parastylid, a small mesostylid, a trace of a metastylid, and a weak terminal heel- 

 style. 



Measurements. 



mm. 

 ( anteroposterior ; 27.5 



Diameters of m-g-< transverse at base, paraconid ; 12 



( " " metaconid ; 11 



Length of heel on grinding face ; 7.5 



