358 DR. J. MURIE ON THE [ May 26, 
Each parietal (Pa, fig. 7, B) constitutes a broad but low arch; the 
narrow anterior crescentic angle, as in other ruminants, goes down 
between the squamous postfrontal and orbito-sphenoid elements to 
meet the alisphenoid. 
The squamous element of the temporal bone, agreeably to the 
low form of the brain-case, is not deep. The convexity of the 
bone is moderate, and the upper sutural arch long and a little raised. 
The foramen, situated at the root, and upper surface of the zy- 
goma, common to the Ruminants, in the Prongbuck, as in the An- 
tilopidee and Ovidee, is wide to excess ; and the perforation is seen 
to run superficially or within the diploé of the cranium, and to 
communicate with the mastoidal cells. The articulating surface or 
glenoid facet (g/), moreover, is more bovine- than cervine-shaped ; 
only that the bounding ridge behind and the tubercle and post- 
glenoidal ridge are not so prominently developed as in the former. 
The external auditory canal (4w) is large, and sticks upwards and 
backwards prominently. 
With the discrimination displayed in all his papers, the late Mr. 
Turner points out ‘that in the Moschidz and Cervide the styloid 
process becomes free almost immediately at the base of the audi- 
tory process, while in the Bovide or Cavicorn Ruminants it is 
enclosed more or less completely for some distance in the down- 
ward and forward direction.” Antilocapra claims kindred with 
the latter family in the disposition of its styloid process, which is 
shortandensheathed. But, furthermore, the moderately enlarged tym- 
panic (Ty) does not agree with that ofits supposed ally, the Chamois, 
where it is remarkably triangular and compressed. Neither does it 
display a roundish inflated character as does the Antelopes’, excepting 
the caprine group. On the contrary, in spite of the styloid ensheath- 
ment, the tympanic element of the Prongbuck, as far as my ob- 
servations go, is singularly cervine or Goat-like in its development. 
The paramastoid process (Pmd) is short, moderately wide antero- 
posteriorly, and does not underhang or pass beyond the condyles. 
It is thick-rooted, or has a considerably high rough mastoidal emi- 
nence behind the auditory canal. 
I have alluded, in the general views of the skull, to the perpendi- 
cular character of the supraoccipital plane, and may further note that 
it is surmounted by a narrow transverse portion suturally connected 
with the parietals. The truncation of the supraoccipital (So) is not 
only very apparent, but it absolutely inclines forwards below. ‘The 
spine and occipital protuberance are each well marked. The former 
is broad, moderately raised, and the muscular impressions on each 
side are deep rough coneavities. The superior curved line forms a 
wide, sharp-edged, and regularly formed arch, terminating laterally 
in the short paramastoids, at the root of which posteriorly a short 
shallow groove is discernible. 
The condyles possess two distinet articular planes, which meet in 
a mesial raised acute line, whose direction is parallel with the pos- 
terior border of the paramastoid. Both facets, as in Deer, are rela- 
tively flat, the hinder one nearly vertical, the fore one directed ob- 
