EOCENE OEOCODILIA. 
61 
anteriorly, they are smaller and less pronounced. The lateral olfactory 
ridges of the inferior surface are not strongly defined. The sculpture of the 
lower jaw consists of rather distant, impressed, punctiform pits in shallow 
depressions. A larger mandibular tooth is smooth, and not sulcate at the 
base. 
A cervical vertebra has a short, simple, obtuse hypapophysis, not con¬ 
nected with the parapophyses. Its cup is a little deeper than wide. Surface 
near articulations smooth. A dorsal, with hypapophysis and lateral capi- 
tulum, has a depressed centrum. The centrum of a sacral vertebra is, on 
the other hand, compressed, and, though this is partly due to pressure, the 
form is normally much less depressed than usual. Fragments of the jaws 
are coarsely pitted-rugose. 
The second specimen is of a larger Crocodile, and presents similar 
characters. The third and fourth cervicals show the hypapophyses and 
parapophyses fused together into a crescentoid mass below the articular 
cup, as in D. subulatus, Cope. In such centra, the cup is a little deeper 
than wide. In a lumbar, the surface next to the posterior shoulder is sculp¬ 
tured with longitudinal grooves, a character not seen in the dorsals. 
The broken, terminal part of the snout of this specimen is flat. Tlie 
premaxillaries are wide, and extend an inch and a half posterior to the 
nares. The latter are narrowed at the region preserved, and their posterior 
border is notched by the projecting ends of the nasals. The surface is 
deeply, coarsely corrugated at the middle, and becomes smoother toward 
the edges of the maxillary bones. The surface between the anterior angles 
of the orbits is moderately rugose, like the maxillary borders, while the 
superior arches of the cranium are deeply pitted. The posterior part of the 
dentary bone is more strongly pitted than the anterior, and its depth, with 
that of the adjacent part of the angular bone, shows that the external 
foramen is small. 
The greater part of two successional teeth are preserved, in one 
instance in the alveolus of the large maxillary pair. They are neither of 
the short and obtuse, nor of the slender and acuminate type. They are 
but little compressed, and have opposite, low cutting-edges. The surface 
is roughened with rather coarse, undulating ridges. One, at least, of the 
