A MKMOlli UI'OX TJIE GENUS. 
orbit tlo- 'I’apir’H HkuH. 'I'lu- orbit is sitiuited slightly in advance of the 
middle of the skull, its anterior termination being above the middle of the second 
umh'ir. In the 'Ihipir the orbit has a slightly more anterior jiosition, its anterior 
limit IsMiig alsive the first true molai. 
'I'he orlut in this s)K*eies is small and bear-like; it looks more forward and 
outwanl than in the 'fapir’s skull, and is separated from the temporal fossa by 
nstn.uglv iiiarktHl inistorbital priM-ess. The antero-posterior extent of the tem- 
|s.nd ro.«su is very gn-at, and its height at the middle is very much greater than in 
that of tlie 'rapir: the external surface is deeply concave, its middle por- 
tion at the fnmtal .sipiaino.sal sutinv being slightly convex. Comparing this 
n-giou with that of the Tapir’s skull we see how' much more reduced the cerebral 
volume must have Is-eii than in the Tapir. Superiorly and anteriorly the 
tem|s.ral ridges overhang the temiMiral fossa very prominently. Comparing the 
si-Ai* ami form <d* the tmu|s)ral fossa in this species Avith that of the living Cami- 
vop's, wv find that the lateral convexity of the w'alls and the reduction of the crest 
ill the hitt«-r are much less than in Palceosyops pahic/osus, and it is not until we go 
lnM-k to the FxH-eiie CnsHloiits, that we .see a like reduction of the brain, and a con- 
('omitaiit diH'|H-uiug of the lateral cranial region of the skull. In the form and 
weight of its zygomatic arch this species differs wn'dely from recent Perissodactyles, 
mid iippniaches the Caruivoi'es, although we have yet to see one of the Felids 
ill which the zygomas an* as strongly developed as in P. paludosus. The zygomatic 
arch ill this s|M*«'ies is very strongly compressed, its posterior portion is Avidely set 
off from the t<'m|Hiral n*giou of the skull, and in this character approaches that seen 
ill the Ik'iirs. 'file middle |M>rtion of the arch first de.scends, and then gradually 
iiMiMiils to tin* strongly compn*ssed and plate like malar portion. 
The palate iii this s|K*cies is flat and broad, and its roof is not so coua'CX as in 
that of Tclniatotheriiini. 'I'he posterior extension of the palate is to the posterior 
lionler of the s4><*oiid molar. 'I’he basioccipital region of the skull is very broad; 
mid this is »*s|K*eially marked betAveen the jiostglenoids, Avhere this region is nearly 
twice ns broad as in the 'I’apir’s skull. Like that of recent Peri.ssodactyles the 
Interal |Mirtiou of this region is proA’ided AA'itli large A’acuities Avhich lead into the 
ermiial cavity . 
Prenutxtllartes. — 'I'he pivniaxillaries in this species are shoid, rounded and 
stnmgly depn's.sed. ^ icAviul fnmi the front these bones are coiiA'ex and shoAV no median 
k€*i*l, the pp'simce of Avhich is .so characteristic of megarhinus. The outline of the 
pp'iiiaxiliaries fnmi Isdow is round; posteriorly they^ send ofi’ tAA'o horizontal max- 
illary pr«K*e.ss«-s including IndAveen them, and upon each side, the .separated incisive 
foramina. this n>gion of the skull in Palceosyops paludosus strongly' resembles 
that of the (’ariiivoivs in form; it is broad and short as in the latter order. In 
the skull of the Ikmr the premaxillaries are prolonged farther upon the palate than 
III t u skull of f . paludosus •, in the latter they are A'ery short and do not extend 
farther u|kui the jialate than a line drawn between the anterior border of the 
