. A manual of zoology. Zoology. ir. VERTEBHATA: MAMMALIA. 619 and beaver (fig. 652, a). More iniportant than these are the modi- fications of dermal glands into mammary or milk glands, which, indeed are so characteristic that they have given rise to the name mammalia. These are almost invariably sebaceous glands (in the monotremes sweat glands) which empty in great numbers upon a restricted area of the skin, which, except in monotremes, is elevated into true nipple (fig. 046, A), or around which the adjacent skin A r>. Please note that these images are extracted from scanned page images tha
. A manual of zoology. Zoology. ir. VERTEBHATA: MAMMALIA. 619 and beaver (fig. 652, a). More iniportant than these are the modi- fications of dermal glands into mammary or milk glands, which, indeed are so characteristic that they have given rise to the name mammalia. These are almost invariably sebaceous glands (in the monotremes sweat glands) which empty in great numbers upon a restricted area of the skin, which, except in monotremes, is elevated into true nipple (fig. 046, A), or around which the adjacent skin A r>. 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. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
