Vol. 5] 



Merriam. — John Day Carnivora. 



15 



MEASUREMENTS. 



N. N. lemur 

 latidens lemur Cotype 



Type Type" Cope 7 

 7 7 7 



No. 



3 ii 



No. 

 1 5 



P*, antero-posterior diameter. 

 M 1 , antero-posterior diameter. 

 M 1 , transverse diameter 



7 5 5.8 



8 7.8 7.8 

 4.5 3.8 3.5 



5 5.2 5 



7.2 

 5.8 

 7.4 

 3.6 



5.3 

 7.4 



5.3 



7 



M 2 , antero-posterior diameter 

 M 2 , transverse diameter 



5.25 



In a small cranium (pi. 2, fig. 2. No. 10208) having the gen- 

 eral form and dimensions of lemur, the snout is exceedingly nar- 

 row, the temporal ridges do not unite posteriorly and the brain 

 case is relatively very large. It appears even larger than in 

 lemur, and the superior outline is strongly convex over the pa- 

 rietals. 



Another small, narrow-nosed skull evidently belonging in 

 lemur exhibits a perfectly preserved brain cast (pi. 2, fig. 3, 

 No. 10209) illustrating the principal features of both cerebrum 

 and cerebellum. This specimen resembles lemur in dimensions 

 and general form. In most respects the brain of this species is 

 strongly similar to that of Cynodictis as figured by Scott s for 

 G. gregarius of the White River. 



Galecynus latidens Cope, Bull. TJ. S. Geol. Surv., Vol. 6, p. 181, 1881. 

 Cynodictis latidens (Scott), Trans. Am. Phil. Soe., 1S98, p. 400. 

 Nothocyon latidens (Wortman and Matthew), Bull. Am. Mus. Nat. Hist., 

 Vol. 12, p. 127. 



In our collection there is a perfectly preserved and unworn 

 inferior carnassial (pi. 2. figs. 6 and 7, No. 88) exhibiting a 

 feature which Cope considered characteristic of latidens, viz., the 

 "possession of a narrow tubercle at the external base of the prin- 

 cipal cusp." There is also a very small tubercle anterior to the 

 base of the entoconid. The length of this tooth is somewhat less 

 than that of the type of latidens, and the heel is relatively short. 



"No. 6888, Amer. Mus. Nat. Hist., Col. Vert, Palae. 



7 No. 6889, Amer. Mus. Nat. Hist., Col. Vert. Palae. 



8 W. B. Scott. Canidae of the White Kiver Oligocene, 1898. Trans. Am. 

 Phil. Soc, Vol. 19, PI. 19, Fig. 12. 



NOTHOCYON LATIDENS Cope. 



PI. 2, Figs. 6 and 7. 



