136 MR. R. OWEN ON THE ANATOMY OF THE CHEETAH. 
In the description of the outward configuration of the cerebral hemispheres in the 
Cheetah and other feline species, I have limited myself to noting those convolutions only 
which, after a careful comparison of the materials at my disposal, appeared to be sub- 
ject to least variety. But even with this limitation a very small portion of the cerebral 
surface remains undescribed; and the constancy manifested in the disposition of the 
remainder, as to the form, extent, and symmetrical arrangement of the convolutions, 
argues strongly in favour of the conclusion that the folding of the hemispheric sub- 
stance in the progress of its development, follows a determinate law; and that the 
tracing of the additional convolutions, as they successively present themselves in suc- 
ceeding complexities of the cerebrum, may not only tend to advance zoology by bringing 
to light additional instances of affinities between the different groups of Mammalia, but 
ultimately lead to the determination both of the amount and locality of the convo- 
lutions in the human brain which are analogous to those of the inferior animals. 
PLATE XX. 
Fig. 1. Superior view of the brain of the Cheetah. 
2. Side view of the same. 
3. Mesial surface of the right hemisphere of the same. 
4. Superior view of the brain of the domestic Cat. 
5. Side view of the same. 
6. Mesial surface of the right hemisphere of the same. 
A. The cerebrum; B. the cerebellum; C. the medulla oblongata; D. the spinal cord. 
The smaller letters and figures are explained in the text. 
anteriorly, and forms a large portion of the anterior lobe: the middle one turns outwardly, and joins particu- 
larly the external lateral mass, which does not extend farther forwards than about two thirds of the whole 
extent of the cerebrum: the external or lateral mass is subdivided by two transverse perpendicular fissures into 
three conyolutions, of which probably the posterior may be Combativeness, the middle Destructiveness, the 
anterior Secretiveness and Alimentiveness; these three all unite below. 
«The under surface of the anterior lobe is divided by a fissure extending nearly in the direction of the outer 
margin of the olfactory nerve, as in Man, in whom the mesial convolution contains Individuality: this in the 
Cat may perhaps include other organs. 
“The brains of the whole genus Felis are similar as to these general divisions, though the convolutions vary 
as to their relative proportions in each species, and frequently in individuals of the same species. 
“Tn comparing the genus Felis with the Dog tribes, the posterior internal longitudinal mass is much smaller 
than the middle; and in the Jackal the middle mass is half as much more voluminous as the internal mass, 
while in most of the Cats these parts are nearly equal, and in some the internal preponderates. The posterior 
division of the external lateral mass, Combativeness, is smaller than the middle one, Destructiveness, in the 
Cats, while the opposite fact appears in the Dogs: in this respect the Lion approaches more to the Dag tribe 
than any of the genus Felis.” —H. H. H. 
