. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 144 HARRIS HAWTHORNE FIG. 5 for each of the others, and where these folds come together there are formed Iriradii, or centers from which folds radiate in three directions. Upon this original surface certain epidermic units (scales?) which are un- doubtedly very primitive, and were there before the formation of pads and folds, become definitely arranged in concentric circles over the pads, and in lines along the folds. Nearly every stage in this rearrangement may be found by looking over the more primitive mammals, e
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 144 HARRIS HAWTHORNE FIG. 5 for each of the others, and where these folds come together there are formed Iriradii, or centers from which folds radiate in three directions. Upon this original surface certain epidermic units (scales?) which are un- doubtedly very primitive, and were there before the formation of pads and folds, become definitely arranged in concentric circles over the pads, and in lines along the folds. Nearly every stage in this rearrangement may be found by looking over the more primitive mammals, especially marsupials and lemurs. The separate rows of units tend to unite to form ridges, which possess an important function in increasing the friction, and thus preventing slipping. In monkeys, Fig. 4, the pads and folds are flattened down to an approximately level surface, but the arrangement of the ridges still indicates the former condition. The relief has become a picture. In man, Fig. 5, the reduction in functional importance of these friction-ridges allows all forms of degeneration, both in the individual patterns and in the ridges. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
