Cope] 444 [Mays, 



Measurements of Fore Limb. M. 



... ^ ., (external 015 



Anteroposterior width trapezoides •] . , n., , 



^ (internal Oil 



Length of median metacarpal 104 



_,.,,. , ( transverse (total) 025 



Proximal diameter ^ ... ,^,r, 



( anteroposterior 017 



T^. ^ ~ .,,, e 1 c. 1 (anteroposterior.. .015 



Diameters of middle of shaft cannon bone < . , „ 



< transverse 017 



Length proximal phalange 044 



Proximal width of do 036 



Length of second phalange 025 



Proximal width do 024 



Length proximal lateral phalange (measured at middle) 023 



ungual " " " " 018 



The phalanges just measured are presumed to belong to the anterior 

 limb because no bones distinctively of the posterior limb were preserved 

 in the collection. 



The OS innominatum differs in a number of respects from that of the 

 horse, although its general characters are equine. The peduncle of the 

 ilium is long and slender and subtriangular in section, and the ischium 

 has a long anteroposterior diameter. The postacetabular crest is promi- 

 nent, but not very acute. The pubis Is subcylindric in section, and is not 

 concave above as in the horse. The posterior bifurcation of the iscliia is 

 not so exteiasive as in the horse. Pectineal ridge more prominent than iu 

 the horse. 



Measurements of Innominatum. 



M. 



Length of ilium from fossa lig. teris to edge of crest 130 



Diameter of peduncle externally at middle 034 



" '' acetabulum (long) 033 



Length of ischiopubic median suture 065 



" " obturator foramen 040 



" " Jschium remaining posterior to obturator fora- 

 men 043 



The preceding measurements show that the Uippotlierium speciosum was 

 about the size of the Antilocapra americana or pronghorn Antelope, but 

 had relatively more robust limbs and a shorter neck. 



HiPPOTHERiUM PLiCATiLE Leidy. 

 Proceedings Academy Philadelphia, 1887, p. 309, Fig. X |. 



This species is represented by two superior molar teeth and probably by 

 numerous bones, in the collection of Prof. Jos. Leidy. They are all from 

 the Loup Fork bed of Florida. The crowns of the molar teeth are 

 elongate and nearly straight. The anterior internal column is median in 



