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II.—Preliminary Note on some Recently Discovered Extinct Vertebrates from Egypt. (Part II.)

1901; Cambridge University Press; Volume: 8; Issue: 10 Linguagem: Inglês

10.1017/s0016756800179750

1469-5081

Chas. W. Andrews,

Morphological variations and asymmetry

In the lower beds remains of a Sirenian are very common, and several more or less complete skulls associated with some portions of the skeleton were found. The skull in most respects resembles that of Halitherium . The snout is strongly deflected and bears a pair of downwardly directed incisor tusks. There are about seven cheek-teeth, resembling in pattern those of Halitherium . The roof of the skull between the temporal fossæ is flat. A cast of the braincase has been made, and in most respects it resembles that described by Owen as the type of Eotherium ægyptiacum , from the Mokattam of Cairo. Since this seems to have come from nearly the same horizon as our specimens, I believe that there is the highest probability that they are referable to this same species, in spite of some differences between the shape of the natural cast described by Owen and that artificially made from one of our specimens.