1882.] PROF. ST.-GEORGE MIVART ON THE ZLUROIDEA. 515 
bronchi long and narrow in Hyena; while in Suricata the bronchi 
are very large, and almost without rings. 
In Felis, Viverra, Genetta, Hemigalea, Herpestes, Suricata, Pro- 
teles, and Hyena the lungs are divided into four lobes on the right 
side, and into three on the left side. 
In Crocuta' the right lung has six lobes and the left lung three. 
Meckel (J. c. p. 492) says that the two lower left lobes in the Genet 
form but one, and that in the Tiger, Leopard, and Puma there are 
also but two on the left. 
Great Blood-vessels. 
In Felis, Viverra, Genetta, Hemigalea, Proteles, and Crocuta the 
aortic arch gives off one great trunk, whence arise first the right sub- 
clavian and then the carotids. The left subclavian is given off 
separately *. 
In Felis, Genetta, Prionodon, Hemigalea, Herpestes, and Cro- 
cuta® the abdominal aorta does not give off common iliac arteries, 
but first gives off two large arteries which spring opposite each 
other from the aorta and are the external iliac arteries, and then 
continues on fora short space before giving off another pair of 
vessels (also arising opposite each other), which are the internal 
iliac arteries. 
Tae Brain. 
In the brain of the Cat, and in the brains of such Felide as I have 
had the opportunity of seeing, there is a well-marked crucial sulcus, 
the hinder inner end of which is separated (on the inner surface of 
each cerebral hemisphere) from the anterior end of the calloso-mar- 
ginal sulcus by the continuation forwards of the hippocampal gyrus 
into the superior external gyrus. This condition does not seem to 
obtain in any non-feline #luroid. 
In Genetta the superior lateral gyrus (s) runs simply forwards 
beside its fellow of the opposite side without being divided by any trans- 
versely extending crucial sulcus, the place of which is only indicated 
by a minute notch on its inner border (en). Nevertheless the supe- 
rior lateral gyrus bears a small depression (d) placed a little behind 
and external to the notch just mentioned ; and this depression may 
represent the outer end of the crucial suleus of Felis. 
At its anterior end the superior lateral gyrus dips down, and then 
becomes in part continuous with the middle lateral gyrus (m) above 
the upper end of the supraorbital suicus (0 s). 
The Sylvian fissure (Sf), which is rather long and strongly con- 
cave forwards, is bounded on each side by the inferior lateral gyrus, 
which gyrus is much broader behind than in front of the Sylvian 
fissure. The inner side of the anterior end of the superior lateral 
gyrus (beyond the notch ¢ 2) runs backwards, beneath the calloso- 
marginal sulcus, and becomes continuous with the hippocampal gyrus. 
From the minute indication of the crucial sulcus (¢ 2) a sulcus runs 
1 p. Z.8. 1879, p. 88, fig. 4. 
2 Meckel (Anat. Comp. vol. ix. p. 396) appears to have found all four vessels 
spring from a common trunk in the Genet. 
* P. ZS. 1878, p. 89. 
