458 Annals of the Carnegie Museum. 



premature to do so. This doubt is justified by the fact that the 

 mandibular dentition of B. borealis is still unknown, and we cannot 

 therefore determine whether the lower molars possessed the very char- 

 acteristic PalcEomeryx fold, and it is uncertain whether the type of 

 the European species had developed horns." '" 



While collecting vertebrate fossils from the Upper Miocene deposits 

 in the Lower Madison Valley in Montana (1894-1896) Earl Douglass 

 found portions of lower jaws and teeth of Blastomeryx, the last lower 

 molars being nearly like the type of the genus. In the same beds 

 two portions of lower jaws were obtained, which were much larger 

 than those of Blastomeryx, and the lower molars possessed the so- 

 called '■^ PalcEomeryx fold" which was then supposed by him to be 

 characteristic of Palceomeryx. These specimens were therefore de- 

 scribed under the generic name PalcBomeryx. The most nearly com- 

 plete mandibular ramus (PI. LXII, Figs, i and 2) was named Palceo- 

 nieryx amertcafius .^ Two upper premolars and the greater portions 

 of the three upper molars of one individual (PI. LXIII, Fig. 2) were 

 in the original description provisionally referred to this species.'' In 

 the same deposits, a portion of a brain-case (Figs. 2 and 3) as large 

 as that of Blastometyx borealis Copft, was found, but not described. 



Since that time the American Museum of Natural History has re- 

 covered sufficient material for the restoration of Blastomeryx. This 

 has been described by Matthew in a recent paper entitled "The 

 Osteology of Blastomeryx and Phylogeny of the American Cervidae."* 

 This paper settles doubts, if any existed, with regard to the generic 

 identity of the true Blastomeryx and the larger species described in the 

 present paper. 



In the spring of 1899, Mr. Earl Douglass found, in the Flint Creek 

 beds (Upper Miocene) near New Chicago in Montana, a skull, the 

 corresponding parts of which do not differ in any important particular, 

 so far as the present writer is able to discern, from the portion ot a 

 skull which is the type of Blastomeyrx borealis Cope, or from the more 

 complete skull which was found in the same deposits. With the skull 

 from the Flint Creek deposits, were associated the left horizontal 

 ramus of the mandible, and good parts of the skeleton. 



^ "The Miocene Lake-beds of Western Montana," University of Montana, 1899, 

 p. 21. 



'/. c, p. 22. 



^ Bull. Ainer. Mas. Nat. Hist., Vol. XXIV, 1908, pp. 535-562. 



