The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . alrow, when complete, consists of ^four bones, which, beginning onthe inner side, are the three ?cuneiform bones, internal (c),middle (c-), and external (c^),articulated to the distal surface ^^^^^of the navicular, and the cuboid mcta(cb), articulated with the calca-neum. Of these the middlecuneiform is usually the smallestin animals in which all five digits fro[^uie°tibidare d
The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . alrow, when complete, consists of ^four bones, which, beginning onthe inner side, are the three ?cuneiform bones, internal (c),middle (c-), and external (c^),articulated to the distal surface ^^^^^of the navicular, and the cuboid mcta(cb), articulated with the calca-neum. Of these the middlecuneiform is usually the smallestin animals in which all five digits fro[^uie°tibidare developed; but when the is wanting the internal cuneiform may be rudimtot-ary or altogether absent The three cuneiform bones sup-port respectively the first, second, and third metatarsals,and the cuboid supports the fourth and fifth ; they thusexactly correspond with the four bones of the distal rowof the carpus. In addition to these constant tarsal bones, there may besupplemental or Sesamoid bones:—one situated near themiddle of the tibial side of the tarsus, largely developed inmaQy Carnivora and Hodentia ; another, less frequent, onthe fibular side ; and a third, often developed in the tendons. ics of tlio Right iQctatai sua ; PA, jihalangea ; f,cakuncum; a. ; cb,cuboid; n, navicular; c, in-ternal cuneiform; c^. middlecuneiform ; c^, external cunei-foi-ra. Tlic dicits ore indicatedlIs, countingtlic fibular DIOnSTIVE SYSTEM.] MAMMALIA 361 of ,tlie plantar surface of the tarsus, is especially large inArmadillos. There is also iLsually a pair of sesamoid boneson the plantar aspect of each mctatarso-plialangoal articula-tion. The metatarsal bones never exceed five in number, andthe phalanges follow the same numerical rule as in themanus, never exceeding three in each digit. Moreover, thefirst digit, counting from the tibial side, or hallux, resemblesthe poUex of the hand in always having one segment other digits. As the function of the hind
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Keywords: ., bookauthorbaynesth, bookcentury1800, bookdecade1890, bookyear1892
