456 
extinct BOVID.E, CANID/E and felid.e 
This species, which I propose to call Dmciask serus, increases the number of 
P&locene Felidre to four. The three other species are Smdcdon fatal, s Leidy, 
X. gracilis Cope, and Felis atrox Leidy. 
Bos CRAMPIAXUS Cope, sp. nov. Plate XXII, Pigs. W. 
Founded on that part of the skull which is anterior to the orbits, the greater 
part of the left horn-core ; and a smaller part of the right horn-core. 
The muzzle displays characters simihar m general to those of Bos amert- 
canus, including the concave palate and the incurvature of the alveolar border an- 
terior to the premolar teeth. Thenareal borders are also similar to those ot that 
species, and the nasal bones are not generally difterent in form. Their extremities 
are lost in the specimen, as are those of the premaxillary bones. The expanse to the 
anterior orbital border is such as to render it evident that the width of the cranium at 
the orbit is greater relatively and absolutely than in B. americanus, the orbital 
border itself being broken away. The species is especialy distinguished by the great 
size and peculiar form of the horn-cores. The entire left core is preserved, exeejit 
that some pieces have been lost from the inlerior side, and the basal border is Avant- 
ing. As it is, the fragment measures twenty-nine inches on the chord of its curve, 
or nearly three times the length of the longest core of the American bison vA'liich 
I have seen. The latter, which is part of the skull of an old bull in the museum 
of the Academy, measures eleven inches in the chord. 
The hom-core is strongly curved, the apex pointing upAvards and forwards. Its 
diameter diminishes regularly to the subacute tip. The surface is coai’sely grooved 
longitudinally, the widest groove being on the posterior face. The posterior face is 
flat from near the base to the apex, the flattening being most conspicuous on the 
distal two-thirds of the length. It results that the section of the core is a triangle 
Avith a broadly rounded apex. A flattening of the superior face of the last ten 
inches of the length is at right angles to the posterior face, and forms Avith it a 
prominent angular ridge. The section at this point has a convex and tAvo flat sides. 
The great size of the horns renders comparison necessary with Bos lah- 
frons only. The museum of the Academy^ contains the fragment of the skull from 
the Big-bone Lick, Kentucky, described by Leidy, Avhich supports the basal third 
ot the left horn-core. This specimen offers no trace of the flattening characteristic 
ol B. craniptanus. The only perfect cores of B. latifrotis knoAvn to me are 
contained in the museum of the Society of Natural History of Cincinnati. They 
Avere found in a gravel bed in southern Ohio, and are figured by Dr. J. A. Alleiff in 
his monograph on the American bison. These horns (from both sides) are repres- 
ented as having a sub-circular section, and are without flat planes at any part of 
t leir length. The curvature is less, but this character may haAm a considerable 
range of variation. 
' Memoirs of the Museum of Comparative Zoology, Cambridge, iMass. 
