88 R. S. Lull — Neiv Tertiary Artiodactyls. 



was modeled in detail on the one side and the flesh on 

 the other. This plan has, I believe, been followed else- 

 where (Colorado) in the mounting of the actual bones and 

 modeling the flesh on one side, although I was unaware 

 of it at the time the present restoration was attempted. 

 In both my Anchisaurus and the Colorado mount the mis- 

 take was made of modeling completely the limbs of the 

 flesh side, leaving the others in their skeletal condition, 

 which made the result incomplete from either aspect. 

 In Alet ornery x, therefore, I erected the skeleton, using 

 as few supporting wires as I could, and then modeled the 

 muscles of the right side of the body, head, and all four 

 limbs, so that, viewed from the right, the model is that 

 of a complete animal in the flesh, while the left aspect 

 displays practically the entire skeleton. The bones, with 

 the exception of the skull and pelvis, are nearly all remov- 

 able and may thus be studied in detail. Sisson's Anat- 

 omy of Domestic Animals, and photographs and a 

 mounted head of the prongbuck {Antilocapra) were 

 used in the preparation of the model, the muscula- 

 ture of which was studied and rendered with great care. 



Morphology. 



axial skeleton. 

 Skull (Figs. 2-6). 



Holotvpe, Cat. No. 10732, Peabody Museum Collection. 

 Paratypes Nos. 10747, 10744, 10735, 10734, etc. Two 

 males, two females, and one or more of indeterminate sex, 

 probably males. 



The skull of Aletomeryx is well proportioned, with an 

 ample brain case, the basi-cranial axis forming an angle 

 of an average of 20 5 / 7 degrees with the palate, the 

 measurements running 12 y 2 , 13 y 2 , 16, 23, 23^, 27-54, -29 

 degrees through seven skulls in varying condition of 

 crushing. It therefore somewhat approximates that of 

 Antilocapra, in which the average of three skulls is about 

 23 degrees, with almost no variation among them. 

 Antilocapra, however, gives the impression of a greater 

 flexion of the face upon the cranium than does Aleto- 

 meryx. "With the deer the axis of the face is nearly in 

 the same line as that of the cranium. Aletomeryx, 

 therefore, in this regard agrees with the hollow-horned 

 ruminants rather than with the deer. 



