. Catalogue of the fossil Mammalia in the British museum, (Natural History). Mammals, Fossil. (EEOPID^. 3 by Leidy in the Journ. Ac. Nat. Sci. Philad. ser. 2, vol. vii. p. 403, pi. XXX. figs. 45, 46. Presented hy Professor J. Leidy, 1876. 47501. Cast of the greater portion of the mandible. The original was obtained from the Bridger (Lower) Eocene of Wyoming, , and is described and figured by Leidy in the " Extinct Vertebrate Eauna of the Western Terri- tories" (Eep. Geol. Surv. Terr.), p. 71, pi. v. figs. 1-3 (), under the name of Trocjosus castoridens^ of whi


. Catalogue of the fossil Mammalia in the British museum, (Natural History). Mammals, Fossil. (EEOPID^. 3 by Leidy in the Journ. Ac. Nat. Sci. Philad. ser. 2, vol. vii. p. 403, pi. XXX. figs. 45, 46. Presented hy Professor J. Leidy, 1876. 47501. Cast of the greater portion of the mandible. The original was obtained from the Bridger (Lower) Eocene of Wyoming, , and is described and figured by Leidy in the " Extinct Vertebrate Eauna of the Western Terri- tories" (Eep. Geol. Surv. Terr.), p. 71, pi. v. figs. 1-3 (), under the name of Trocjosus castoridens^ of which ifc is the type. Presented by Professor J. Leidy, 1876. Eamily PLATYCHGEROPID^. The type genus appears to the writer ^ to be closely allied to, if not identical with, the North-American Esthonyx. The position of the latter has been much discussed. It was at one time placed by Fig. Esthonyx hurmeisteri, Cope. -The palate and inandible; from the Wasatch Eocene of Wyoming, |. a, lateral view of part of cranium and mandible; 6, oral view of right half of palate; c, oral view of mandible. (From the ' Amer. Nat.') ^ Geol. Mag. dec. 3, vol. ii. p. 360; see also p. 520 of the same. b2. 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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