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 . dicates thome greater pan is [ransiormea aunng me gi owiu ^^ ^ y^^ cranium to which Uie condyle is the animal into bone or is cliaracterized by a peculiar histological structureand chemical composition, being formed mainly of agelatinous basis, strongly impregnated with salts of lime,chiefly phos[i!iate, and disposed in a definite manner, con-
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 . dicates thome greater pan is [ransiormea aunng me gi owiu ^^ ^ y^^ cranium to which Uie condyle is the animal into bone or is cliaracterized by a peculiar histological structureand chemical composition, being formed mainly of agelatinous basis, strongly impregnated with salts of lime,chiefly phos[i!iate, and disposed in a definite manner, con-taining nunibi-ous minute nucleated spaces or cavities calledlacunae, connected together by delicate channels orcanaliculi, which radiate in all directions from the sides ofthe la -infe. Pai ts composed of bone are, next to theteeth, the most imperishable of all the organs of the body,often retaining their exact form and internal structure forages after every trace of all other portions of the organiza-tion has completely disappeared, and thus, in the case ofextinct animals, affording the only means of attaining aknowledge of their characters and affinities. In the Armadillos and their extinct allies alone is an. in close contact, often interlocking by means of fine denti-culations projecting from one boce and fitting into corre-sponding depressions of the other, and held together by theperiosteum, or fibrous membrane investing the bones, pass-ing directly from one to the other, permitting no motion,beyond perhaps a slight yielding to external pressure. Inold animals there is a great tendency for the different bonesto become actually united by the extension of ossificationfrom one to the other, with consequent obliteration of thesutures. The cranium, thus formed of numerous originallyindependent ossifications, retaining through life more orless of their individuality, or all fused together, accordingto the species, the age, or even individual peculiarity, con-sists of a brain c
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Keywords: ., bookauthorbaynesth, bookcentury1800, bookdecade1890, bookyear1892
