. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 416 INVERTEBRATE MORPHOLOGT. After copulation, liowever, the female assumes the degener- ated form, while the male dies. Sill ^^ c t f! ill 3. Order Amphipoda. Like the Isopoda these are essentially marine forms, though the genus Gammarus is aquatic and Orchestia (Fig. 190) partly terrestrial, living among the on sea- beaches just beyond the reach of the waves. The body in ht. Fig. 190.—Diagram of Stuuctuke op Orchestia cavimana (afterNebeski). aO ~ nntennule. m
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 416 INVERTEBRATE MORPHOLOGT. After copulation, liowever, the female assumes the degener- ated form, while the male dies. Sill ^^ c t f! ill 3. Order Amphipoda. Like the Isopoda these are essentially marine forms, though the genus Gammarus is aquatic and Orchestia (Fig. 190) partly terrestrial, living among the on sea- beaches just beyond the reach of the waves. The body in ht. Fig. 190.—Diagram of Stuuctuke op Orchestia cavimana (afterNebeski). aO ~ nntennule. m = uioutb. at^ = auieuiia. mt - Malpighian tubule. br — brail cilia. oc = eye. ce = cerebral ganglion. r = rectum, ch = chf^laif! limb. rd = reprcductive duct. 7tt = heart. ro = reproductive organ. I = liver-cajca. vn = ventral nerve-cord. the Amphipoda is laterally flattenud and presents therefore a very different appearance from that of the Isopoda, though, as in that group, lacking all traces of a carapace. The first thoracic segment is fused with the head, and in Caprella and Ci/nmus the second segment likewise. The appendages of the head and the maxillipeds resemble those of the Isopoda, and the remaining thoracic appendages are limblike, a certain number of the anterior ones frequently possessing a terminal joint capable of flexion upon the succeeding one, or eveu being chelate. The five posterior limbs or the third and fourth only beai epipodial lobes which serve as branchiae, and. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. New York : H. Holt
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