. Animal life as affected by the natural conditions of existence. Animal ecology. THEIE^ PHYSIOLOGICAL TALUE. 21 ornament the outer edges of the skin-scales of reptiles or the carapace of crabs. Hence we are justified in regarding the sculpture thus produced on tha epidermis of these animals as a rudimentary organ; for the microscopic casting hairs, after they have done their duty in inducing the casting, remain where they were formed, somewhat altered in form, it is true, and without any further visible use. Occasionally, however, these hairs, after they have fulfilled their office, are trans
. Animal life as affected by the natural conditions of existence. Animal ecology. THEIE^ PHYSIOLOGICAL TALUE. 21 ornament the outer edges of the skin-scales of reptiles or the carapace of crabs. Hence we are justified in regarding the sculpture thus produced on tha epidermis of these animals as a rudimentary organ; for the microscopic casting hairs, after they have done their duty in inducing the casting, remain where they were formed, somewhat altered in form, it is true, and without any further visible use. Occasionally, however, these hairs, after they have fulfilled their office, are transformed into organs which are capable of serving other useful purposes to the reptile. Thus, for instance, Von Leydig discovered certain organs in the sliin of reptiles, which he designated as organs of a sixth sense, regularly communicating with long elastic hairs which project far above. 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
