41 



INCHES. 



Pelvis, height of ilium above acetabulum 9 



Femur and tibia by actual measurement, allowing for bend at the knee. 26 



Tarsus, from astragalus, and cuboid. ... 3 



Metatarsus and phalanges (estimated from manus of P. paludosus 8 



46 



It is probable that the fore-shoulders were of the same 

 height. From the atlas, axis, and from other cervicals, sev- 

 eral dorso-lumbar vertebrae, and part of the sacrum, a rude 

 estimate places the length of the animal at sixty -seven inches, 

 or nearly six feet, including the head, and excluding the tail. 



In general features it strongly resembled the tapir, with 

 stout body, slender tail, and very short neck, compensated by 

 a proboscis of considerable length. In comparing the heads 

 of the ancient and modern representatives of this class of 

 Perissodactyles, the points of contrast are the wide stout 

 zygomas, the deep temporal fossae, the protruding nasals, and 

 the narrow gaps in the dental series of the older type. 



There are also strong points of resemblance in the struc- 

 ture of the Palceosyops and Palceothere. Some of the cranial 

 homologues have been detailed by Dr. Leidy. The femur of 

 the Palseothere is shorter, the tibia longer ; they are both 

 much stouter. The tarsus of the Palceosyops is narrower, 

 while the remainder of the Pes is very similar. The pelvis, 

 and particularly the ilium and acetabulum of Palceosyops, is 

 more palaeotheroid than tapiroid. The similarity of the fore- 

 shoulder in the two types is also striking. The neck of the 

 Palceosyops was probably shorter. 



In the descending series of Palceotheres terminating in 

 the diminutive P. minus, and characteristic of the upper 

 eocene of France, we have an interesting counterpart in the 

 large family of Palceosyops, of equal diversity of size and 

 characteristic of our lower eocene, and it is hoped that future 

 discoveries will render a complete discussion of this interest- 

 ing coincidence possible. 



LIMNOHYUS, Leidy. 



Proceedings Academy Natural Sciences, Phila., 1872, p. 242 ; Palaeosyops ; 

 Marsh, American Journal Sci. and Arts, 1872, p. 122 ; Hayden's Survey, 

 1872, p. 592, Cope. 



Generic characters. Resembles Palceosyops in general fea- 



