76 The Alligator and Its Allies 
of this process is a concavity that looks like another 
articular surface. Laterally the articular articu- 
lates with the supra-angular; ventrally and poste- 
riorly with the angular. 
The angular (Fig. 23, 20, Fig. 21, 22) forms the 
ventro-posterior border of the jaw and of the 
external mandibular foramen. Its narrow, poste- 
rior end forms a part of the prominent process men- 
tioned in connection with the articular. Between 
it and the posterior edge of the splenial is the 
internal mandibular foramen, which is much smaller 
than the external (Fig. 23, 28). Anteriorly the 
angular articulates with the dentary, coronoid, 
and splenial; dorsally with the supra-angular and 
the articular. 
The Hyoid (Fig.25). The hyoid being mainly of 
cartilage is usually not seen in prepared skeletons. 
It is thus described by Reynolds: 
“The hyoid of the Crocodile consists of a wide 
flattened plate of cartilage, the basilingual plate 
or body of the hyoid, and a pair of cornua. 
“The basilingual plate (Fig. 25, 1) is rounded ante- 
riorly and marked by a deep notch posteriorly. The 
cornua (Fig. 25, 3), which are attached at a pair of 
notches near the middle of the outer border of the 
basilingual plate, are partly ossified, but their ex- 
panded ends are formed of cartilage. They pass 
at first backwards and then upwards and inwards. 
They are homologous with part of the first bran- 
chial arches of Selachians.”’ 
