196 MR. F. E, BEDDARD ON THE [ Feb. 16, 
the ascending limb of the same, which, as already described, is 
connected with the splenial. I do not find this fissure in 
Dicotyles. 
It does not seem to me that there can be any doubt as to what 
is to be regarded as the Sylvian fissure in Babyrussa. Both 
specimens agree entirely in the position of the fissure which I 
thus identify ; the only differences were slight ones of length and 
direction of curvatures. I consider as Sylvian the fissure which 
arises, as Shown in the accompanying figure (text-fig. 19, p. 195), 
from the point where the nonpallial portion of the hemisphere is 
widest, where the rhinal fissure, that is to say, is most convex 
towards the pallimm. But I am not to be understood to deny 
that this may be a ‘ pseudo-sylvian’ fissure formed by the meeting 
of two lips over # true Sylvian fissure. Deep down between the 
opercula an island of Reil is visible, precisely as Dr. Garson has 
figured* in the Pygmy Hog (Sus salvania). The figures of the 
brain of the Babyrussa which are appended to this paper show, 
in fact, that the characters of the brain are those of other Suide, 
and that the divergences from the prevailing pattern in that 
group are only slight, and not at all in the direction of the New 
World Dicotyles, nor of the remaining allied family, that of the 
Hippopotamuide. 
Résumé of New Facts. 
The following are the principal new facts contained in the 
foregoing pages and stated as briefly as possible, with references 
to the pages where the full description will be found. 
(1) The Himalayan Tapir (Vapirus indicus or malayanus), like 
the two species of Elephant, has a pleural cavity which is 
mainly obliterated by the formation of a dense network of 
strands of connective tissue uniting the two layers of the 
pleura.) (Seep. L613) 
(2) Hyrax dorsalis like H. syriaca (described by Lonsky) has a 
third ceecam about an inch long lying between the unpaired 
and the paired ceca. The orifice of the ileum into the 
unpaired cecum has, unlike what is found in H. syriaca, 
a circular valve. There are specific differences between 
HI. dorsalis and H. capensis in the cecum. (See p. 166.) 
(3) The azygos vein in Hyrax capensis is, as a rule, confined to 
the right side of the body. An additional vein on the left 
side is rare:. (See p. 162.) 
(4) The sulci of the brain of Hyrax capensis + show considerable 
variation. This is especially noticeable in the Sylvian and 
the pre- and post-Sylvian. (See p. 163.) 
(5) Hyrax agrees with Hlephas in possessing a free fold of 
peritoneum of considerable dimensions attached to each testis 
* Toc. cit. (on p. 170). 
+ This is not an entirely new fact, I extend the data of Dr. Elliot Smith. 
