. A biology of Crustacea. Crustacea. FEEDING, LOCOMOTION AND RESPIRATION 27 bears a group of brush-like setae which push the food trapped on the filter forwards to the maxillules where another group of setae pushes the food on to the mandibles, and so into the mouth. A mechanism of this type is found in the mysidacean Gnathophausia, which is a primitive representative of its group. Gnathophausia swims by means of its abdominal limbs (pleopods), and uses the ANTENNULE LABRUM 1ST MAXILLR 2ND MAXILLA MANDIBLE TUBE BEARING OPENING Ofi EXCRETORY Ci. Fig. 19. A, Head of Triops granarius (Notostraca)
. A biology of Crustacea. Crustacea. FEEDING, LOCOMOTION AND RESPIRATION 27 bears a group of brush-like setae which push the food trapped on the filter forwards to the maxillules where another group of setae pushes the food on to the mandibles, and so into the mouth. A mechanism of this type is found in the mysidacean Gnathophausia, which is a primitive representative of its group. Gnathophausia swims by means of its abdominal limbs (pleopods), and uses the ANTENNULE LABRUM 1ST MAXILLR 2ND MAXILLA MANDIBLE TUBE BEARING OPENING Ofi EXCRETORY Ci. Fig. 19. A, Head of Triops granarius (Notostraca). The legs on the left side of the figure have been emitted, and the mandible on that side pulled back to show its teeth, which are normally hidden beneath the labrum. Notice that there are no antennae, the functions of these organs are taken over by the prolongations from the first leg. B, Trunk limb of Triops granarius, note the absence of filter setae. C, Second trunk limb of Lepidocaris, orientated in the same way as fig. B, with the inner border to the right (C, after Scourfield, 1926).. 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 Green, J. (James), 1928-. Chicago, Quadrangle Books
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Keywords: ., bookcentury1900, bookcollectionbiodiversit, booksubjectcrustacea
