. An introduction to the osteology of the mammalia . is small, and the internal and middlecuneiform bones are small and united together. XIX.] UNGULATA. j~> Various gradational stages between the complete tridac-tyle foot of the Rhinoceros and the monodactyle foot ofthe Horse are met with in extinct species of the Perisso-dactyla. In the Artiodactyla the third and fourth digits are nearlyequally developed, and their ungual phalanges are flattenedon their contiguous sides, so that together they constitute a

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbones, bookyear1885