Vol. 5] Merriam. — Strepsicerine Antelopes from Nevada. 329 



The resemblance to the prong-horns which is shown in the 

 horn cores of Sphenophalos will mean very little if the horns of 

 Sphenophalos be found to be of the long, slender type of the true 

 antelopes. The only suggestion that they may have been rela- 

 tively short is given in the slight tendency of the horns to flare 

 a short distance above the base. It is hoped that later finds 

 may furnish material which will make possible a determination of 

 the entire outline of the horn core. 



With the fragmentary material available it is probably not 

 desirable to attempt the definite reference of Sphenophalos to 

 any of the existing subdivisions of the antelopes, although it 

 appears to be not far removed from the tragelaphine forms of 

 the Thousand Creek fauna. 



The collections from the Tertiary beds of the region of Virgin 

 Valley and Thousand Creek have been as yet only partially 

 examined, and in the present communication only the horn cores 

 have been described, as they seem for the present to constitute 

 the most satisfactory basis for comparison. No reference has 

 been made to a number of specimens representing dentition and 

 general skeletal structure, as the scattered and fragmentary 

 nature of the material is such that only a most careful study will 

 make a correlation of the parts possible. It is probable that a 

 more exhaustive study of the collection will considerably increase 

 our knowledge of these forms, as the dentition of the antelopes 

 has been well described, and made available for comparison by 

 Schlosser. 5 



BELATED FORMS IN AMERICA. 



With the exception of the rupicaprine or chamois group as 

 represented by the mountain goats, the true antelopes which are 

 so wonderfully represented in the Old World have not until 

 recently been known to have been present at any time in the 

 fauna of the New World. 



In an important paper on "A Pliocene Fauna from Western 

 Nebraska" Dr. W. D. Matthew and Mr. Harold Cook have 

 recently described* 1 a most interesting fauna resembling that from 



Schlosser, M., Abh. Mat. Ph. (1. k. Bay. Akad. d. Wis., Bd. 22, p. 161. 

 n Bull. Amev. Mus. Nat. Hist., vol. 26, pp. .">(il-414. 



