. College collection of palaeontology. . MAMMALIA, 17 FAMILY LOPHIODONTIDiE. " Coj)e emimerates fifty species in the Lophiodontidce, all from the Eocene of America and Europe. They vary in size from that of a Rabbit to that of an Ox, and resemble most, among living animals, the Tapirs. No. 25. [105] Pliolophus VUlpicepS, Owen. Skull and Lower Jaw (cast). This odd- toed, hoofed herbivore, stood intermediate between the Tapir and Palteothermm, and has some affinities to the Hog and Horse. The dentition is like that of nearly all Eocene quadrupeds, atype not exhibited by any later (?) or exi
. College collection of palaeontology. . MAMMALIA, 17 FAMILY LOPHIODONTIDiE. " Coj)e emimerates fifty species in the Lophiodontidce, all from the Eocene of America and Europe. They vary in size from that of a Rabbit to that of an Ox, and resemble most, among living animals, the Tapirs. No. 25. [105] Pliolophus VUlpicepS, Owen. Skull and Lower Jaw (cast). This odd- toed, hoofed herbivore, stood intermediate between the Tapir and Palteothermm, and has some affinities to the Hog and Horse. The dentition is like that of nearly all Eocene quadrupeds, atype not exhibited by any later (?) or existing mammal, namely: three incisors, one canine, four premolars, and three molars in each ramus. Six species of this genus are known, five of them being from the American deposits. This interesting fossil was discovered in the London Clay (Eocene), of England, and is now in the British Museum. SECTION B-ARTIODACTYLA. In this section the digits are four or two in number, and the axis of the limb passes between the third and fourth, which make a sym- metrical pair, and by their compressed form have suggested the term " ; The femur has no third trochanter. The dorsa- lumbar vertebrae are usually nineteen. The true horns are in trans- verse pairs, with osseous " ; The antlers of the Cervidce are themselves osseous, and deciduous, and are not regarded as " true ; The stomach is complex and the csecum small. The hornless species have usually long canines. Among larger mammals, now living, this section is the most num- erous, and is extensively represented in the Tertiary, beginning with the Eocene. The species were few in the Eocene and included no ruminants. The earliest were apparently the ancestors of the Hogs, as the Eohyus and Helohyus, and they had the tubercular (bunodont) dentition, which was common in the Artiodactyla through all the Tertiary, but is now found only in the Hogs and Hippopotami (non-ruminants). The
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