A MK.MOJK UPON THE GENUS 
Uiiiti* to ron.i tl.f v.TV pn.iiiiiH-nt sagittal crest wliicli medially contains a deep 
unM.ve 'I'he sagittal m-st only extends about one-tliird the length of the parietal 
ns.f iM-fore it diverges int<. the anterior temporal ridges already ^pferred to. 
The 8upra4K-cipital region is triangular in outline, and bordered by 
the proiiiin.-nt lateral crests. Its surlace above the foramen magnum is very promi- 
ii.-iit, ami hn-iiis lati-rally strong ridges on each side for muscular attachments. Supe- 
riorly this n-gi'‘» iH-comes concave ami is not widely overhung by the lambdoidal crest. 
The'most sniM-rior and isisterior part of the temporal fossa is formed by a portion 
of thesupnuH-eipital. 'I'his is a character common to the Tapir’s skull but is absent 
fn.m the skull of the Uarnivoivs, {Ursus). The lateral extension of the exocci- 
pitals is verv gnmt in this species, owing to the extreme width of this part of the 
ts-eipiit. 'rite lateral jiart of the exoccipitals is bent slightly forward fbnning an 
angle with the imalian jHirtion of the same. At the posterior inferior angle of the 
«K-eipiit tlu> large pans-cijiital proce.sses are given off. These proce.sses in this 
s|Ka-ies an- cpiiti- diflen-nt in form from those of recent Perissodactyles, and they ap- 
pn»a«-h thos«- of Rhinoceros in form more nearly than tho.se of the Tapir. The 
pans-eipitals an- very hmail and heavy and they terminate below in a styloid process 
which pndtulily «lid not extend iM-yond the condyles. The external borders of these 
pnK-«-ss 4 -s «-«»im- in contact with the |«)st-tympanics of the squamosal. At the upper 
part of the jnm-tion of the panK-cipitals and post-ta mpan ics there is present in this 
skull a Iarg4- foratnen leailing into the cranial cavity (parama.rtoid). TJie presence 
4if this foraim-ii is a constant character in the skull of the Tapir and Khinoceros 
In litfnns this foramen, if pn-.sent, is not well expressed. In the Dinocerata the 
|uininnistoid foraim-n is pn-s(-nt and is placed in nearly the same position as in 
I'ttl<rosyof>s. 
Tin ndyh*s in this s|H*cies, as in all the other species of this genus, have a 
gn-at tmnsv«-rs«- ext4-nt ; viewe<l from the side they project much farther behind 
than in tin- 'I'apir’s skull. 
The |Mirtion of the (K-cipnt la-aring the condyles is, as it were, much constricted 
from tin- iN-eipnt. thus pHslucing the very prominent aspect of this part of the 
skull. I In- anterior and inferi»n' ends of the condyles are separated by a longitudinal 
imteh ; hut on *-aeh side a tongue-shaped process from the condyle extends a short 
(listain-4- n|Mni tin- basicK-cipital. The foramen magnum is oval in outline and 
very long transvei-st-Iy. In the skull figured by Leidy, the foramen magnum has a' 
inneh gn-at4-r transver.s4- extent than in that of the Tapir. The general form of 
this forann-n n-.st-inhles clo.st-ly that of the Carnivores, being squarer in outline 
than in Jo/nrus, with its sujx-rior lM)rder deeply incised and bordered upon each side 
hy fw«i pniininent convex pnK-esses abutting against the continuations of the' ex- 
•Htdpitals. I he basioccipital with the basisphenoid forms a broad triangular basal 
axis to the skull and their junction is on a line with the glenoid facets. The basi- 
•K-tipital is \erv hroad po.steriorly, the anterior portion having a very prominent 
