. [Collected reprints, 1912-1919. Mammals; Mammals; Birds. 58 Field Museum of Natural History — Zo5logy, Vol. XL Family CASTORIDiE. Beavers. Tail broad and flat (paddle shaped), hairless and covered with scales; hind feet broadly webbed; skull stout; incisors noticeably large and strong. The general character of the skull is sciurine, but postorbital processes are absent and the infraorbital foramen is nearly concealed by a large nearly vertical ridge of the maxilla; the auditory meatus is. Skull of a Beaver. (About Yi nat. size.) long and tubular and extends upward above level of the zygoma;
. [Collected reprints, 1912-1919. Mammals; Mammals; Birds. 58 Field Museum of Natural History — Zo5logy, Vol. XL Family CASTORIDiE. Beavers. Tail broad and flat (paddle shaped), hairless and covered with scales; hind feet broadly webbed; skull stout; incisors noticeably large and strong. The general character of the skull is sciurine, but postorbital processes are absent and the infraorbital foramen is nearly concealed by a large nearly vertical ridge of the maxilla; the auditory meatus is. Skull of a Beaver. (About Yi nat. size.) long and tubular and extends upward above level of the zygoma; lower leg bones separate; five toes on both fore and hind feet; second toe of hind foot with double or divided claw. The family consists of but one genus, Castor, represented in North America by one species and five geographical races. They are large, aquatic Rodents, the largest living representatives of the order in North America, often weighing 40 or 50 pounds, and are much hunted and trapped for their skins, which are one of the best known commercial furs. The anal glands of the Beaver contain a strong scented, oily fluid known as "Castoreum," which is much used by trappers as a bait to attract the animal. It is also used more or less in the manufacture of perfumes, and is claimed to possess medicinal properties. The only other living representative of this family is the European Beaver (C. fiber), which is very similar to our species; it differs in being somewhat smaller, the skull is comparatively lighter, and the nasal bones are 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 Cory, Charles B. (Charles Barney), 1857-1921. s. l. , s. n.
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