Dr. J. E. Gray on a new species of Antilocapra. 425 



recently received ; and more lately, Mr. Moore, the Keeper of the 

 Derby Museum, submitted these horns to my examination, requesting 

 my opinion on them. At his request I bring a short notice of them 

 before the Society, in hopes to obtain further information respecting 

 them, and a specimen of the animal itself, should it prove to be a 

 distinct species of the anomalous American Antelope. The horns are 

 most probably from America ; but this is not certain, as the special 

 locality has not been recorded, nor the person from whom they were 

 obtained. 



The colour, substance, and texture of the hair on the skin of the 

 forehead attached to the horns, exactly resembles that of the Cabrit or 

 Prong-horn {Antilocapra Americana, Gray, Cat. Mam. B.M. p. 1 1 7), 

 and if it were not for the very peculiar form of these horns, I should 

 have been inclined to have considered them as only the deformed 

 horns of that animal ; but both the horns are alike and have the same 

 peculiarities, which is not usual in malformations ; under these cir- 

 cumstances it appears better to regard them provisionally as belonging 

 to a distinct species, to be established or erased from the list as further 

 knowledge may decide. 



There can be no doubt of the position of the horns, as a part 

 of the upper surface of the orbit is to be observed, with the remains 

 of the eyelids and eyebrows at the base of the left horn. 



Fig. 1. Antiloca2)ra Americana. Fig. 2. Antilocapra anteflexa, 



Antilocapra anteflexa. 



The horns compressed, dark brown, rugose, rounded and curved 

 and arched behind, compressed in front, becoming more so as they 

 reach the supra-medial frontal process. The apex subtrigonal, 

 evidently compressed and angularly bent forwards rather above the 

 compressed frontal process, with a deep furrow rather on the inner 

 side of the middle of the hinder upper part of the bend ; the inner 

 edge of the recurved tip is rounded, the outer compressed, rather 



