. Bulletin - American Museum of Natural History. Natural history; Science. 1,^4 Bulletin American Museum of Natural History. [Vol. VI. foramen ovale, forwards to the opening of the foramen rotundum, and undoubtedly indicates the presence of an alisphenoid canal. The presence of a foramen lacerum medium cannot be deter- mined, but a deep groove in the side of the basioccipital repre- sents a large carotid canal, which would be completed were the tympanic bullae in position. The region of the posterior lacerated and condyloid foramina is too much broken to show them dis- tinctly. There are no po
. Bulletin - American Museum of Natural History. Natural history; Science. 1,^4 Bulletin American Museum of Natural History. [Vol. VI. foramen ovale, forwards to the opening of the foramen rotundum, and undoubtedly indicates the presence of an alisphenoid canal. The presence of a foramen lacerum medium cannot be deter- mined, but a deep groove in the side of the basioccipital repre- sents a large carotid canal, which would be completed were the tympanic bullae in position. The region of the posterior lacerated and condyloid foramina is too much broken to show them dis- tinctly. There are no post glenoid foramina. The stylomastoid has its usual position, and forms a deep groove between the mastoid and paroccipital process. There is another foramen of considerable size which opens backwards and downwards upon the posterior wall of this process. This foramen appears to be peculiar, and is not represented in any of the modern Carnivores. The brain-ease is very small in proportion to the size of the skull. While the skull is considerably larger than that of the sea-lion, the actual capacity of the cranial cavity is less than one- third as great. Its walls are remarkably thick. The cerebellum was entirely uncovered by the cerebral lobes, and the tentorium was very little, if any, ossi- fied. The cerebral cavit) shows that there were at least two longitudinal or suprasylvian convolu- tions, much as in the more primitive carnivor- ous brain. There is no satisfactory evidence of a crucial sulcus. The cere- bellum was relatively large, and the walls of its cavit) are unusally thick. The roof is marked 1>\ a deep longi- tudinal furrow for the lodgment of the vermis of the cerebellum. The lower jaw of the nature of the skull, and is remarkabl) heavj and robust. The horizontal rami are short and deep. The symphysis is rather short, and the chin abruptly rounded. The lasl molar is pla< ed < lose against the base of the coronoid process, which rises rapidly and
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