. Catalogue of the fossil Mammalia in the British museum, (Natural History). Mammals, Fossil. ZEUQLODONTIDiB. 49 Suborder ARCH^OCETI. Teeth differentiated into groups; nasals long. Family ZEUGLODONTID^. Dentition:—I. | C. i, Pm. and M. | The cheek-teeth (wood- cut, fig. 10) have two distinct roots, and compressed pointed crowns with denticulated cutting-edges. The cranium is elongated and depressed; the brain-cavity small; the temporal fossae and the sagittal crest are large; the rostrum is long and largely composed laterally of the premaxillee; and the nasals are elongated, flat and narrow. A
. Catalogue of the fossil Mammalia in the British museum, (Natural History). Mammals, Fossil. ZEUQLODONTIDiB. 49 Suborder ARCH^OCETI. Teeth differentiated into groups; nasals long. Family ZEUGLODONTID^. Dentition:—I. | C. i, Pm. and M. | The cheek-teeth (wood- cut, fig. 10) have two distinct roots, and compressed pointed crowns with denticulated cutting-edges. The cranium is elongated and depressed; the brain-cavity small; the temporal fossae and the sagittal crest are large; the rostrum is long and largely composed laterally of the premaxillee; and the nasals are elongated, flat and narrow. All the cervical vertebrae are free, and the lumbars elongated. Genus ZEUGLODON, Owen\ All the known forms of the family may be provisionally referred to this genus, which has been recorded from the Eocene of jN^orth America, England, and Egypt. A tooth and caudal vertebra are figured in the accompanying woodcut. Eig. Zeuglodon ceioides.—A, molar tooth; B, caudal vertebra : reduced. From the Middle Eocene of North America. (After Lyell.) ^ Lond. & Edin. PbiloB. Mag. vol. xiv. p. 302 (1839). The earlier name Basilosaurus, Harlan, was withdrawn by its author. PART V. E. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). Dept. of Geology; Lydekker, Richard, 1849-1915. London, Printed by order of the Trustees
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