. Elementary text-book of zoology. Zoology. D ( FIG. 296.—Grubea fusi- fera (after Quatre- fages). Ph. pharynx D, alimentary can;il ; C, cirri; F, tentacles. Sub-class 1.—CHLETOPODA.* Free living Annelida, with paired tufts of seta' on the segments, frequently with distinct head, also with tentacles, eirri, and branchice. The Cha?topoda are divided externally into segments, which correspond with the rnetameres of the internal organs, and are, with the excep- tion of the anterior region, which is distinguished as the head, usually tolerably alike (fig. 296). Parapodia provided with setfe are ve
. Elementary text-book of zoology. Zoology. D ( FIG. 296.—Grubea fusi- fera (after Quatre- fages). Ph. pharynx D, alimentary can;il ; C, cirri; F, tentacles. Sub-class 1.—CHLETOPODA.* Free living Annelida, with paired tufts of seta' on the segments, frequently with distinct head, also with tentacles, eirri, and branchice. The Cha?topoda are divided externally into segments, which correspond with the rnetameres of the internal organs, and are, with the excep- tion of the anterior region, which is distinguished as the head, usually tolerably alike (fig. 296). Parapodia provided with setfe are very frequently present on the segments; their prin- cipal function is that of locomotion, but their va- rious appendages, the branchice and cirri, also discharge tactile and respi- ratory functions (fig. 297).. ' Besides the older works of Savigny. Audouin et Milne Edwards, and Quatrefages, compare E. Grabe, " Die Fami- lien der ; Art-It ir fiir Naturgescli, 1850 and ;>1. E. Clapim-dc, •• lii.'ohoivhes anatomique sur les Annelidcs. etc.," Geneve^ 1861. E. Cla- parede, " Les Annelidas cheto- podes du golfe de Napli^." Geneve et Bale, 1868. also Sup- plement. 1870, and " Eecherches sur la structure des Ann61ide8 sedentaires," Geneve, 1873. Fr. Lej'dig, 1. c,, also '• Tafeln zur vcrgl. Anatomic," 1864. FIG. 397.—Dorsal (DP) and ventral (I'P) Para- poclinm with bundles of seta? of Nereis (after Quatrefages). Ac, Aciculum ; Re, dorsal cirrus ; Be, ventral 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; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
