The American Museum journal (c1900-(1918)) (17971826290)
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Title: The American Museum journal
Identifier: americanmuseumjo05amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library
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50 THE AMERICAN MUSEUM JOURNAL Chrysochlorid^. Living. South Africa. These are known as Cape Golden Moles and take the place of the true Moles in South Africa. A fossil species has been found in the Miocene of Patagonia, indicating that they formerly inhabited both southern continents. Adapisoricid^. Extinct. Lower Eocene. France. Imperfectly known. DlMYLID.^. Extinct. Lower Miocene. Europe. Only two molars in upper and lower jaw, the second quite small. Premolars reduced, no canine. Jaws are exhibited in the table-case. IV. RODENTIA, OR GNAWERS. Mice, Squirrels, Beavers, Hares, Porcupines etc. Small mammals with claws on the toes, five digits on each foot, the teeth reduced in number, a pair of upper and lower incisors special- ized for gnawing. The gnawing teeth grow continually from per-
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FIQ. 1\. SKULL OF THE RAT The most familiar type of the rodentia. Natural size sistent pulps, during the lifetime of the animal. They have enamel only on the anterior surface and wear to a chisel-like edge which is continually renewed by the more rapid wear of the dentine behind the enamel. The Rodents are the most numerous group of mammals, but they are almost all small. There are probably now more different