The teeth are short, stout, compressed so as to form cutting-edges, and are somewhat obtuse. They are finely striated from base to tip. The premaxillary held four teeth; these are all broken off, but from their fangs it appears that they formed an uninterrupted row, and were subequal in size. The maxillary accommodated fifteen teeth, of which the fifth is the largest, and forms a very prominent canine. The posterior maxillary teeth are proportionately larger, and more equal than in either crocodile or alligator. The _nasals_ are rather broad; they send processes into the anterior narial opening, which tend to divide it, but this division was probably not complete. The limits of the _prefrontals_ and _lachrymals_ are so obscure as to preclude description. The _frontals_ are long and very narrow, though wider than in the alligator. They are smooth and flat, exhibiting no concavity on top. They expand considerably at the posterior part of the orbit, at the sutures with the post-frontals. These bones are long, stout, and curved very strongly outwards. The _mastoids_ are of remarkable size; they project far backward along the tympanic, and encroach largely upon the occipital region. It is partly owing to this that the occiput is so high. The _parietals_ are short, and very narrow between the temporal orifices, behind these they expand considerably. The orbits are large and of irregular shape. The _malar_ is long and rather slender. _Measurements._ M. Length from occipital border to end of muzzle ·455 Breadth of cranium at postorbital angles ·0935 Breadth of cranium between temporal orifices ·019 Breadth of forehead between orbits ·036 Breadth of temporal orifices ·037 Fore-and-aft diameter of the same ·038 Fore-and-aft diameter of the orbits ·073 Length of face in advance of the orbits ·3055 Breadth of face outside of the fifth maxillary tooth ·176 Breadth of muzzle as formed by premaxillaries (about) ·114 Breadth of muzzle at notch for canine ·093 Length of premaxillaries to notch ·080 Estimated length of entire alveolar border ·283 Breadth of articular surface of quadrate ·059 Vertical height of occiput ·124 Vertical diameter of foramen magnum ·016 Transverse diameter of foramen magnum ·025 Vertical diameter of condyle ·023 Transverse diameter of condyle ·028 Length from palatine foramen to end of pterygoid ·120 Length of palatals ·1295 Length of palatine foramen ·142 Greatest breadth of palatine foramen ·051