. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. TRACHEAL GILLS. 535 only applied externally to the viscera, but partially traverse them and serve at the same time to support them. Tracheal gills are present in the form of leaf-like or filiform appendages on the body of the larvae of Phryganidce, Ephemericce (tig. 444), and in the rectum of the larvaj of yEschna and Fig. 4tt.—a. Larva of Ep\em'ra with seven pairs of tracheal pills Kt, slic^htly maRBifiecl. Tk, An isolated tracheal gill, strongly masfnitied. b. Tracheal system of an Agr
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. TRACHEAL GILLS. 535 only applied externally to the viscera, but partially traverse them and serve at the same time to support them. Tracheal gills are present in the form of leaf-like or filiform appendages on the body of the larvae of Phryganidce, Ephemericce (tig. 444), and in the rectum of the larvaj of yEschna and Fig. 4tt.—a. Larva of Ep\em'ra with seven pairs of tracheal pills Kt, slic^htly maRBifiecl. Tk, An isolated tracheal gill, strongly masfnitied. b. Tracheal system of an Agrion larva (after L. Dufour); Tst, tracheal trunk; Na, accessory eyes. In the last case the walls of the rectum are very muscular, and are capable of regularly pumping in and out water, thus giving rise to a kind of respiratory 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 Claus, Carl, 1835-1899; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
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Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
