. A guide to the fossil mammals and birds in the Department of Geology and Palæontology in the British Museum (Natural History) .. . phodon elephantopus (Cope; (f nat. size),from the Wasatch Eocene, New Mexico, (after Cupe). also plaster-casts of teeth and bones of the same animal from theEocene lignites of Soissons in. France. Several species from 26 Dinocerata. Coryphodon. ,No. 20. the Eocene of North. America have been described : plastercasts of the fore and hind feet of one of these are exhibited. Coryphodon was the largest of the early EoceneUngulates ; it had
. A guide to the fossil mammals and birds in the Department of Geology and Palæontology in the British Museum (Natural History) .. . phodon elephantopus (Cope; (f nat. size),from the Wasatch Eocene, New Mexico, (after Cupe). also plaster-casts of teeth and bones of the same animal from theEocene lignites of Soissons in. France. Several species from 26 Dinocerata. Coryphodon. ,No. 20. the Eocene of North. America have been described : plastercasts of the fore and hind feet of one of these are exhibited. Coryphodon was the largest of the early EoceneUngulates ; it had six npper incisors and moderate-sized upper-canines ; the cranium has no protuberances or horn-cores; theastragalus has no head ; there is a third trochanter to thefemur. The five-toed feet, which resemble in structure thoseof the Dinocerata, indicate some affinity to that group, whichit also preceded in time. Sub-order 4.—Dinocerata. This division contains a most remarkable group of hugeextinct herbivorous mammals, the remains of which have beenfound in great abundance in the Eocene Tertiary strata ofWyoming, North Fig. 35.—Restoration of Tinoceras ingens(Marsh). One-thirtieth natural size. Eocene Tertiarylake-basin, Wyoming, North America. The fore and hind limb had feet with five well-developedtoes, each terminating in a hoof: the femur and tibia wereplaced vertically in a line, as in the hind leg of the nasal bones were elongated, having two small pre-nasalbones in front of them; the animal does not appear to havebeen furnished with a proboscis. The most striking feature is the skull, which is surmountedby three pairs of rounded protuberances or horn-cores, which Condylarthra and Toxodontia. 27 were probably enveloped in horny sheaths. There are no upperincisors, but the upper canines are developed into large andpowerful flattened tusks, directed downwards, and protected oneach side by the broadly-expanded margin of the bone of thelower jaw. One
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmammals, bookyear1896
