. Animal life as affected by the natural conditions of existence. Animal ecology. 168 THE INFLUENCE OF INANIMATE SFBRODNDINGS. appendages of the skin, known as gills or branckise, and finally the interior of the intestinal canal. In very many Invertebrate animals—as in Holothuria, Annelida, Planarians, Water-Insects, and others—a constant stream of water enters by the anus, and. Fig. 47.—a, Anabas scandens; head, with * the Rill-cavity laid open, and I the conti- guous cavity containing the foliated labyrinthine structure, b. Tadpole ; c, young Polypteru "from the Mle ; d, embryo of the S
. Animal life as affected by the natural conditions of existence. Animal ecology. 168 THE INFLUENCE OF INANIMATE SFBRODNDINGS. appendages of the skin, known as gills or branckise, and finally the interior of the intestinal canal. In very many Invertebrate animals—as in Holothuria, Annelida, Planarians, Water-Insects, and others—a constant stream of water enters by the anus, and. Fig. 47.—a, Anabas scandens; head, with * the Rill-cavity laid open, and I the conti- guous cavity containing the foliated labyrinthine structure, b. Tadpole ; c, young Polypteru "from the Mle ; d, embryo of the Shark. All these have external gills, br. in a few cases, as in Holothuria, a very easily demonstrable stream passes out from it also. Thus, in the simplest condition, the mucous membrane of the intestine serves for respiration, like the skin of an animal; and in this respect the well-known. 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 and Co.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishernewyo, bookyear1881
