. On the anatomy of vertebrates [electronic resource] . Upper molar (m 2), Equus eaballus. Upper molar (m 2). Megaccros. horse approaches nearest to the symmetrical type of the Rumi-nants, in which the homologous parts of the crown can, mostly,be well defined. In the unworn crown of the Ruminant molar, fig. 271, thevalley, g, h, extends across the crown more parallel with thelong axis of the jaw, than in fig. 268, curving with the concavityoutward: it communicates with the valley, i; and, as in Paloplo-therium, this is continued to the foreside of the crown, as at /,fig. 269, severing the lobe
. On the anatomy of vertebrates [electronic resource] . Upper molar (m 2), Equus eaballus. Upper molar (m 2). Megaccros. horse approaches nearest to the symmetrical type of the Rumi-nants, in which the homologous parts of the crown can, mostly,be well defined. In the unworn crown of the Ruminant molar, fig. 271, thevalley, g, h, extends across the crown more parallel with thelong axis of the jaw, than in fig. 268, curving with the concavityoutward: it communicates with the valley, i; and, as in Paloplo-therium, this is continued to the foreside of the crown, as at /,fig. 269, severing the lobe c from a. In Ruminants, both theanterior and posterior entries to this antero-posterior double-curved cleft are so shallow that they are soon obliterated, and thelobe b is continued by a tract of dentine, with d, along the hindpart of the crown: as the lobe a is continued into lobe c at thefore part, as seen in the worn molar of the deer, fig. 271 : themiddle of valley, e, is separated from the end i, as in the horse:but the course of this valley is
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Keywords: ., bookcentury1800, booksubject, booksubjectbirds, booksubjectfishes
