ANTHROPOIDEA 707 
from that of the Simiide by the deeply cleft lateral fissures, and 
has a comparatively small and pointed caudate lobe. The enormous 
size of the stomach in Colobus causes the liver to be very narrow, 
and pushed to the left side. The liver of the Cebide (Fig. 336) 
and Hapalide, in ad- ; 
dition to the deeply 
cleft lateral fissures, is 
characterised by the / 
great size and quad- {ij 
rangular form of the || 
caudate lobe (c¢), which 
attains its maximum 
development in dieles. 
The gall-bladder is 
always present. 
The larynx is in many 
Apes furnished with sac- 
like appendages, which 
are variable in different 
species as regards 
number, size, and situ- 
(aa a 
. Fic. 336.—Under surface of the liver of the Black-handed 
ation. They may be Spider Monkey (Ateles melanochir). u, Umbilical fissure ; 
dilatations of the laryn- ve, vena cava; Ul, left lateral lobe ; Ic, left central lobe; re, 
geal ventricle, as in pee fe agi, ro lobe ; s, Spigelian lobe ; 
Simia, Gorilla, and 
Anthropopithecus, or they may open above the false vocal chords 
so as to be extensions of the thyro-hyoid membrane, as in Hylobates. 
There may be but a single median opening in the front part of 
that membrane at the base of the epiglottis, as in the Cercopithecide. 
There may be a single median opening at the back of the trachea, 
just below the cricoid cartilage, as in Ateles; there may be but a 
single sac, or there may be five, as sometimes in Mycetes. These 
may be enormous, meeting in the middle line in front and extend- 
ing: down to the axille, as in the Gorilla and Orang. A sac may 
occupy the cavity of the expanded body of the hyoid, as in Mycetes. 
The hyoid has its basilar part generally somewhat more convex 
and enlarged than in Man ; but in Mycetes it becomes greatly enlarged 
and deeply excavated, so as to form a great bony bladder-likestructure. 
The posterior cronua of the hyoid (thyro-hyals) are never entirely 
absent, but the anterior or lesser cornua may be so, as in Afycetes. 
The anterior cornua never exceed the posterior cornua in length ; 
but they may be (eg. in Cercopithecus) more largely developed 
relatively than in Man, and may even be jointed, as in Lagothria. 
The lungs have generally the form of those of man; but the 
right lung may have four lobes, as in Hylobates. The great arterial 
trunks in Simia, Gorilla, and Anthropopithecus are arranged as in 
