CONDTLAETHEA. 487 



food than the hogs, for instance, use. The food is more hkely to have re- 

 sembled that of the quadrumana. What means of defense this species 

 had is not easily surmised, as the canine teeth and hoofs are not large. 



I have named this species after Mr. Jacob L. Wortman, of Junction 

 City, Oregon, whose explorations in the West have been more than usually 

 productive of important results. 



Phenacodus calceolatus Cope. 



Proceeds. Amer. Philos. Soc, 1883, p. 559. 

 Plate XXIV g; fig. 7. 



This species is founded on fragments of the skull and limbs, with teeth, 

 of a single individital. The teeth consist of two superior and four inferior 

 molars of one side, and a smaller number of those of the opposite side. 



The teeth are of the size of those of the Phenacodus puercensis, and, like 

 that species, there is no median external cingular cusp of the superior 

 molars. In these teeth the external basal cingulum is weak, but there is a 

 strong anterior cingulum, distinct from any of the cusps. No internal cin- 

 gulum. External cusps conical, well separated; intermediate cusps rather 

 large; internal cusps rather large, close together, but deeply separated. 

 The last superior molar is reduced in size. It has well-developed anterior 

 and posterior cingula, a weak external and no internal cingula The 

 intermediate tubercles are rather large, and there is one large internal 

 tubercle. 



The heel of the last inferior molar is short, wide, and rounded. The 

 posterior tubercle is but little behind opposite the posterior internal tubei'cle. 

 The latter is separated from the anterior inner by a deep fissure, while the 

 opposite side of the crown is occupied by a large median exlemal cusp, 

 which has a semicircular section. The large anterior cusps are confluent 

 on wearing. No anterior cingulum in the worn crown. The crowns of 

 the first and second true molars of the specimen are rather worn. They 

 show that the posterior median tubercle is very indistinct and probably 

 absent The bases of the smaller inner cusps are round, and on wearing 

 unite with the larger external cusps. Of the latter the posterior is the 

 larger. Anterior cingulum rudimental or wanting. No lateral or posterior 



