290 
A MEMOIR UPON THE GENUS 
■ ThP nart of the squamosal bone forming tlm lower half of the 
e .^q _ squamoso-parietal 
kmipoi-al fossa is aigei . temporal fossa. In F. paludostts the suture is 
s„turc. i, beWw . Ue “f" are .„ueh ferreted. The course of 
i-oss.. T,.e 
Ti.er,,,„u,tic,,r„ee.„ft,,e 
0 losalis ver; strong aud placed rvidely out l.-o.n tl.e a.dc ol tl.e skull, umc , 
II sotbau any .eecut Perissodactyle. TW- portion of the r.ygoma tetweeu its 
origin and bend is deeply concave and looks forward ; the posterior face ot it i Ha 
aiiJ looks backwarf and dowuwanl. The external faee 0 the zygoma , p a d 
obliquely and its surface is flat. The superior inlerior extent of tins part ol the 
arch is viy large, and it develops a large surface for the origin oi the niasseter ninscic. 
The articulation of the zygonnatic process and malar ,s very ohliqne and gradual. 
The postglenoid pi-oces., is nii.cli elongated, with a distal rounded and rugose 
extremity. It is bent slightly backward .and turned ontwani on its axis. ho 
relation of the glenoid facet to the postglenoid process is very diflerent in this 
species from that in the Tapir’s skull. In 7h/<r»,t the |K)stglenoKl is strongly com- 
pressed and placed very ohllip.ely to the glenoid facet. The latter is narrow and 
elongated. From the oblique position of these elements in the Tapir s skull, a deep 
triangular space is left between them ; this space looks outward and backward. 
In Palceosyops paludosns, owing to the more nearly ])arallel position of the 
glenoid and its process, this space is largely obliterated. In the Uarnivores, where 
the postglenoid process borders the glenoid facet along its whole extent, this 
is still further the case. The glenoid facet in P. paludosus has very iiiiich the same 
form as in the Tapir, although it is more transversely elongated and shows no anter- 
iorly directed portion. There is no sign of an internal glenoid process in the skull 
of this species. The post-tympanic process is much heavier than in the lapir; 
its middle portion is compressed and distally it forms a club shaped extremity. 1 he 
postglenoid and post-tympanic may nearly touch each other, although there is some 
variation in the relation of these two processes. The periotic is placed deep within 
the recess of the lateral space, its mastoid portion does not appear on the surface ol 
the cranium, and its tympanic part was not ossified to the petrous portion. 
Malar. — The form of the malar in this species is very characteristic, and it 
readily distinguishes it from Telmatotherium. 
At the junction of the malar with the zygomatic process of the sijnamosal, it is 
strongly compressed and forms a broad lateral plate, strongly arched outward ami 
slightly receding. The origin of the malar from the cheek is very gradual and not 
abrupt, as in some species of Tchnatotherimn. The form of the inalar in this 
species differs from that of P. megarhinus in having no broad and shell-like enlarge- 
ment ; its inferior margin is sharp, rough and slightly incurved. The margin of the 
