. A manual of zoology. Zoology. Fig. 5S. Fig. 50. Fig. 58.—Longitudinal section through the nutritive polyp of a siphonophore (after Haeckel). 0, mouth-opening; en, entoderm; ek, ectodern. Fig. 5g.—Stenostoma leiicops, in division, a, ectodermal fore-gut, at a' forming anew for the hinder animal; m, the bhndly ending entoderinal mid-gut, c, ectodermal ciUated epithelium; g, ganglion with ciliated pit; w, water-vascular canal; g', ganglion of the hinder animal. Crustacea (Rhizocephala) have no digestive tract does not alter this statement; for it can be definitely affirmed that, in adaptation t
. A manual of zoology. Zoology. Fig. 5S. Fig. 50. Fig. 58.—Longitudinal section through the nutritive polyp of a siphonophore (after Haeckel). 0, mouth-opening; en, entoderm; ek, ectodern. Fig. 5g.—Stenostoma leiicops, in division, a, ectodermal fore-gut, at a' forming anew for the hinder animal; m, the bhndly ending entoderinal mid-gut, c, ectodermal ciUated epithelium; g, ganglion with ciliated pit; w, water-vascular canal; g', ganglion of the hinder animal. Crustacea (Rhizocephala) have no digestive tract does not alter this statement; for it can be definitely affirmed that, in adaptation to para- sitism, the digestive tract has degenerated. The simplest multicellular, free-living animals are merely simple or branched digestive pouches. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
