. Zoology : for students and general readers . Zoology. AN-ATOMT OF HOLOTHURIANS. 129 on one side arises the " respiratory tree," which has but one main stem, and is only occasionally held in place by mus- cular threads. The branches are numerous, and are smaller. Fig. S^.âPentacta frondosa. t, tentacles; I, longitudinal muBcles; >â , retractor mus- cles of the tentacular system; z, intestine; c, cloaca; 6, respiratory tree; vr, water- vascular ring or nng-canal, v, radial water-vascular canal; m, madreporic body; pp, polian vesicles; am, ampullae; a, «', pseudo-hsemal coutractil
. Zoology : for students and general readers . Zoology. AN-ATOMT OF HOLOTHURIANS. 129 on one side arises the " respiratory tree," which has but one main stem, and is only occasionally held in place by mus- cular threads. The branches are numerous, and are smaller. Fig. S^.âPentacta frondosa. t, tentacles; I, longitudinal muBcles; >â , retractor mus- cles of the tentacular system; z, intestine; c, cloaca; 6, respiratory tree; vr, water- vascular ring or nng-canal, v, radial water-vascular canal; m, madreporic body; pp, polian vesicles; am, ampullae; a, «', pseudo-hsemal coutractile vessels (from Carus); 0, ovary; ow, o\aduct.âDrawn by J. S. Kingsley from a dissection made by the author. and paler than the ovarian tubes. The water enters the cloaca (c), passes into the respiratory tree (5), oozes out 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
