68 
EOCENE CEOCODILIA. 
The specimen selected as type is one of the smallest. The surface of 
the hones is roughened with pits. 
Besides the type-specimen, I obtained a fragmentary cranium and 
numerous dermal scuta of another individual. The . muzzle is wide and 
flat, and is emarginate at the sides for the accommodation of the large 
mandibular tooth. This species must, therefore, be referred to the genus 
Crocodiliis. The cranium is very rugose above, especially on the muzzle. 
The interorbital part of the frontal bone is narrow and thick, and with strong 
inferior crests. The superior surface is covered with numerous closely- 
jjlaced round pits, of which five and six may be counted between the 
orbital borders. The extremity of the quadrate bone is concave trans¬ 
versely, and the exterior end of the condyle is not, or but little, wider than 
the interior. A prominent ridge extends from the former as an external 
inferior alate border of the quadrate. Inferior face of the quadrate con¬ 
cave. The dermal scuta are very few of them keeled, and they are mostly 
united by suture. Their surface is covered with rather small, sharply- 
defined pits. 
Another adult specimen is represented by nineteen vertebrae, part of the 
frontal bone, part of tlie femur, and numerous dermal bones. The frontal 
bone is thick, and with well-developed lateral olfactory ridges. Its supe¬ 
rior surface is marked with closely-placed pits. The inferior carina of the 
dorsal vertebrae extends their entire length, and the sides of the centrum are 
concave. The articular faces are transversely oval. The articular cup of 
an anterior lumbar is round, and its inferior surface is not angulate. The 
centrum of a posterior lumbar is depressed appropriately to the form of the 
sacrum. The balls of the first caudal are depressed, and the centrum is 
angulate below. The ninth caudal vertebra jiossesses diapophyses, and is 
longer than the first. The femur displays a strong tuberosity of the proxi¬ 
mal middle of the shaft. The dermal bones are coarsely pitted, and have 
a trace of a median carina. 
Thickness of the frontal bone at the middle .... 0. 004 
Length of a dorsal centrnin... 0. 015 
Transverse diameter of the cuj) of the same... 0. 0075 
Length of the iiosteiior lumbar. 0. 0145 
