. A manual of zoology. . Fig. 205. — AmphiOXUS lanceolatus. A, transverse section of the pharyngeal re- gion a dorsal aorta; b, atrium; c, notochord; co, ccelom; e, endostyle; g, gonad; kb, branchial lamella;; kd, pharynx; I, liver; my, myomere; it. neph- ridium; r, neuron or dorsal nerve tube; tn, spinal nerves; sp, gill-slits. B, transverse section of the intestinal region; air, atrium; coel, coelom; d. ao, dorsal aorta: int. intestine; vtyom, myomere: nek, notochord: neu, neuron; s. int. v, subintestinal vein. (A, from Hertwig, after Lankester and Boveri; B, partly after Rolph.) latter join
. A manual of zoology. . Fig. 205. — AmphiOXUS lanceolatus. A, transverse section of the pharyngeal re- gion a dorsal aorta; b, atrium; c, notochord; co, ccelom; e, endostyle; g, gonad; kb, branchial lamella;; kd, pharynx; I, liver; my, myomere; it. neph- ridium; r, neuron or dorsal nerve tube; tn, spinal nerves; sp, gill-slits. B, transverse section of the intestinal region; air, atrium; coel, coelom; d. ao, dorsal aorta: int. intestine; vtyom, myomere: nek, notochord: neu, neuron; s. int. v, subintestinal vein. (A, from Hertwig, after Lankester and Boveri; B, partly after Rolph.) latter join to form a median dorsal aorta, which runs backwards imme- diately below the notochord and above the intestine. The principal organs of excretion are about ninety pairs of peculiarly modified nephridia (Fig. 204, npli) situated above the pharynx and in relation with the main ccelomic cavities. An excretory function has also been assigned to a single pair of organs called the brown funnels (Fig. 204, ), also situated on the dorsal aspect of the pharynx at its posterior 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1900
