. Animal life as affected by the natural conditions of existence. Animal ecology. [JyAJJOJJJJ Pig. 9.—stages of casfcirg in the carapace of the freshwater Cray-flsh, from Bratm. I. First stage; r(, the two old cuticular layers; 6, the layer of casting hairs ; c, the epi- dermis cells. II. Second stage; a, 6, c, as in I.; between 6 and c the new cuticle d has intervened. the surface of the skin, and seem admirably adapted to transmit every impact or molecular movement to the sensitive and guiding organs that are connected with them. These sensitive hairs belong to those casting hairs just menti
. Animal life as affected by the natural conditions of existence. Animal ecology. [JyAJJOJJJJ Pig. 9.—stages of casfcirg in the carapace of the freshwater Cray-flsh, from Bratm. I. First stage; r(, the two old cuticular layers; 6, the layer of casting hairs ; c, the epi- dermis cells. II. Second stage; a, 6, c, as in I.; between 6 and c the new cuticle d has intervened. the surface of the skin, and seem admirably adapted to transmit every impact or molecular movement to the sensitive and guiding organs that are connected with them. These sensitive hairs belong to those casting hairs just mentioned, of which some fow, that are placed in suitable positions, have been transformed into such sensitive hair-organs (fig. 8, sh). Many of the teeth and ridges which are formed on the surface of the scales by the coalescence of casting hairs are so placed as to be of use in the difficult process of stripping off th-e whole skin on whose surface they are situated, for they serve as holdfasts to the rough surface of stones. Another still more striking example is exhibited by the family of the Geckos, which are all dis- tinguished by having an immense number of long stiff movable. 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
Size: 1745px × 1432px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublishernewyo, bookyear1881
