. Animal life as affected by the natural conditions of existence. Animal ecology. 20 INTEODUCTION. calculated for this end is evident to me from the fact established by Dr. Braun that the casting of the shells of river Oray-fish is induced in exactly the same manner by the formation of a coating of hairs which mechanically loosens the old skin or. Fig. 8.—Casting process in the skin of reptiles, a, in the clinging bristles o£ the foot of the Gecko ; within the epidermis are seen the casting hairs, hh, destined to form the new clinging bristles, h, in the Adder ; hh, the casting hairs ; the por
. Animal life as affected by the natural conditions of existence. Animal ecology. 20 INTEODUCTION. calculated for this end is evident to me from the fact established by Dr. Braun that the casting of the shells of river Oray-fish is induced in exactly the same manner by the formation of a coating of hairs which mechanically loosens the old skin or. Fig. 8.—Casting process in the skin of reptiles, a, in the clinging bristles o£ the foot of the Gecko ; within the epidermis are seen the casting hairs, hh, destined to form the new clinging bristles, h, in the Adder ; hh, the casting hairs ; the portion of skin above them is pushed away, and the haiis themselves form the ridges on the new skin, c, a scale of PhyllodactylJis, with the little sensitive hairs sh at the right edge, rf, T/uca- dacfylm; 5A, the sensitive hairs; and hh, the casting hairs which do not change during casting. From Cartier. shell from the new. Now the investigations of Braun and Cartier have shown that these casting hairs—which seive the same purpose in two groups of animals so far apart in the systematic scale—after the casting are partly transformed into the concentric stripes, sharp spikes, ridges, or warts which. 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 Semper, C. (Carl), 1832-1893. New York, D. Appleton
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishernewyo, bookyear1881
