. Animal physiology. Physiology, Comparative. 268 RESPIRATORY ORGANS OF AQUATIC around the head alone, and spread out widely into the sem- blance of a flower. In the Nereis (fig. 52) and its allies, they are set upon nearly every division of the body, and are much smaller. Their usual ariangement in these marine woims may be seen in fig. 14G, which represents one of the appendages of Eunice. The tuft of gills is shown at 6 ; at c is seen a bristle- shaped filament, which may perhaps be regarded as the ludmient of a leg ; and the piojections to which the letters t and ci point, also s
. Animal physiology. Physiology, Comparative. 268 RESPIRATORY ORGANS OF AQUATIC around the head alone, and spread out widely into the sem- blance of a flower. In the Nereis (fig. 52) and its allies, they are set upon nearly every division of the body, and are much smaller. Their usual ariangement in these marine woims may be seen in fig. 14G, which represents one of the appendages of Eunice. The tuft of gills is shown at 6 ; at c is seen a bristle- shaped filament, which may perhaps be regarded as the ludmient of a leg ; and the piojections to which the letters t and ci point, also seem connected with the movements of the animal. In the Arenicola (the lob- worm of fishermen) we find the respiratory tufts dis- posed on certain segments only, and possessing more of an arborescent (tree- like) form (fig. 147). 315. A somewhat similar arrangement is seen in the larv£e of many aquatic In- sects, which breathe by means of gills ; although all perfect Insects breathe air in the manner to be pre- sently described. In fig. 148 is represented the larva of the Ephemera (Day-fly), which breathes by means of a series of gill-tufts disposed along the abdomen, and also prolonged as a tail. In the Crustacea, we usually find the gills presenting the form of flattened leaves or plates. In the lower tribes of the class, they project from the surface of the body; but in the higher, they are inclosed within a cavity, through which a stream of water is made con- GlLL-TUFTS OF 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 Carpenter, William Benjamin, 1813-1885. London : H. G. Bohn
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Keywords: ., bookauthorcarpente, bookcentury1800, bookdecade1850, bookyear1859
