20 :^ 
TERTIARY VERTEBRATA OF THE FAYtlM. 
The posterior portion beliind the middle of the orbits is wanting, but the remainder 
is complete and nmlistorted, though nearly all the teeth are missing. In the general 
form of its head this Crocodile must have been very similar to the recent species 
6'. catajilimctus and C. intermedins, the snout being long and slender, its length being 
about 2-f times as great as its width at the level of the front of the orbits, as in the 
species mentioned. The upj)er surface of the preorbital region is somewhat flattened 
and is bent sharply downwards at the sides to the alveolar border, at least posteriorly ; 
as a whole, the snout is bent somewhat upwards, so that in profile it is slightly 
concave above ; it narrows gradually towards its anterior extremity, there being 
scarcely any expansion of the premaxillary region, the posterior boundary of which 
is, however, marked by a slight notch behind the fifth tooth, where the maxillo- 
premaxillary suture passes on to the palate. The facial processes of the premaxillee 
extend back to the level of the alveolus of the third maxillary tooth, while the 
palatine processes reach only to the level of the interval between the first and second 
teeth ; there is a small triangular anterior palatine vacuity. The nasal opening is 
large and an eloirgate oval in outline; the nasals extend into the opening, but the 
premaxillm seem to have just met one another in its posterior border. The anterior 
angle of the palatine bones is opposite the eighth maxillary tooth, and the anterior angle 
of the posterior palatine vacuities is opposite the ninth. The sculpture of the facial 
surface of the bones is much more strongly marked in the neighbourhood of the orbits 
than it is further forwards. 
'I'he alveolar border of the jaw is sinuous, the concavities being at the junction 
of the maxilla and premaxilla and between the seventh and eighth maxillary teeth. 
The alveoli of the anterior premaxillary teeth are comparatively small and are 
almost in contact in the middle line. They are separated from the alveoli of the 
second pair by deep pits for the reception of the anterior mandibular teeth, which 
perforated the upper surface of the snout. The second pair are small, and they 
are in close contact with the much larger third pair, behind which there is a notch. 
'I'he fourth pair are large and are separated by a pit from the smaller fifth and last ])air 
of premaxillary teeth. I’etween the ]n’emaxillary and maxillary series there is a notch 
fur the reception of the large mandibular tooth, 'i'he first three maxillary teeth are 
comparatively small and nearly equal in size, and are separated by shallow pits. 'I'he 
fourth and fifth are much larger, and the sixth is also large and is separated by a ])it 
from the much smaller seventh. Behind this there is a deep notch in the side of the 
jaw. 'I'he eighth tooth is small, the ninth and tenth much larger ; then come six other 
teeth gradually diminishing in size from bofin’e backwards. The teeth themselves are 
nearly all wanting in the ])resent specimen, but in one which is well preserved it can 
be seen that they had sharp anterior and posterior carime and that the inner face 
is flatter than the outer; the enamel is marked with fine parallel grooves. 
As already mentioned, the general form of this skull resembles that of the skulls 
