. A manual of zoology. Zoology. IV. VERTEBRATA: MAMMALIA 547 mal number of young at a birth. Although the mamma? are present in Ijoth sexes, they are functional only in the female, and here only after the birth of the young. A dermal skeleton occurs in few species (, the firm l^ony plates of the armadillos); on the other hand the axial skeleton shows many features not occurring elsewhere. In the skull many of the Ijones already referred to are evident only as centres of ossification, fusing early with their neigh- bors to form larger bones. As the temporal bone shows, parts of diverse orig
. A manual of zoology. Zoology. IV. VERTEBRATA: MAMMALIA 547 mal number of young at a birth. Although the mamma? are present in Ijoth sexes, they are functional only in the female, and here only after the birth of the young. A dermal skeleton occurs in few species (, the firm l^ony plates of the armadillos); on the other hand the axial skeleton shows many features not occurring elsewhere. In the skull many of the Ijones already referred to are evident only as centres of ossification, fusing early with their neigh- bors to form larger bones. As the temporal bone shows, parts of diverse origin may fuse—parts of the visceral skeleton and parts of the cranium; membrane and cartilage bones—so that a sharp line between cranial and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
