166 M. R. Thorpe — Oregon Tertiary Canidce 



Paradaphcenus transversus (Wortman and Matthew). 



This genus was defined by Wortman and Matthew in 

 1899 (p. 129) as follows: "Upper molars much extended 

 and symmetrical transversely; M 3 aligned with outer 

 cusps of anterior molars. Heels of lower molars wide 

 and deep, basin-shaped; M 2 and M 3 with two anterior 

 cusps and basin-heel. ' ' The type species of the genus is 

 P. cuspigerus (Cope), which is based on specimen No. 

 6852, A. M. N. H. 



The species P. transversus was defined at the same time 

 (p. 130) as "Size one third larger (lineal). Upper pre- 

 molars compressed." The type is No. 6851, A. M. N. H. 

 (referred to Amphicyon hartshornianus by Cope). For 

 amplification of this genus and species, Cat. No. 10064, 

 Y. P. M., may be used. It is a skull which lacks the pos- 

 terior part of the cranium, as well as the crowns of part 

 of the dental series, leaving the roots distinct, except 

 those of the incisors. 



In addition to the characters mentioned by Wortman 

 and Matthew, we are enabled to add the following : infra- 

 orbital foramen above posterior part of P 4 ; face short ; 

 diameter of post orbital constriction large ; cranium low 

 and full; sagittal crest barely marked; frontal ridges 

 unite just posterior to coronal suture ; palatonarial bor- 

 der opposite M 3 ; palate flat, descending abruptly at alveo- 

 lar parapet ; P 1 and P 2 spaced ; deuterocone of P 4 prom- 

 inent ; M 3 very small ; zygomata not widely expanded. 



A pair of lower jaws, Cat. No. 12714, Y. P. M., collected 

 near Camp Watson on the John Day River, are identified 

 with this species. In many respects these jaws are sim- 

 ilar to those of Daphoenus. M 3 is a very small convex 

 nub, considerably worn, and may be smaller than indi- 

 cated by Wortman and Matthew. P 3 differs from that 

 of Daphoenus in having a very small incipient posterior 

 cusp. The incisors are small and laterally compressed. 

 Both Nos. 10064 and 12714 are middle John Day. 



It is well to note the spelling of this generic name, Para- 

 daphcenus , while Leidy's generic name is Daphoenus. 



