. Amphioxus and the ancestry of the vertebrates [microform]. Vertebrates; Chordata; Fishes; Ascidiacea; Vertébrés; Cordés; Poissons; Ascidiacés. Figs. 119 and 120. — Auricularia, larva of Synapta (after Semon) ; and Tornaria, larva of lialanoglossus. (After ) a. Anus. -Apical plate, bc^. Anterior body-cavity, communicating witii exterior by the water-pore, be-, bc^. Second and third body-cavities of Tornaria. Circular ciliated liand of Tornaria. Contractile cord between apical jilate and anterior body-cavity of Tornaria. Gill-pouches. Hydrocoel of Auricularia
. Amphioxus and the ancestry of the vertebrates [microform]. Vertebrates; Chordata; Fishes; Ascidiacea; Vertébrés; Cordés; Poissons; Ascidiacés. Figs. 119 and 120. — Auricularia, larva of Synapta (after Semon) ; and Tornaria, larva of lialanoglossus. (After ) a. Anus. -Apical plate, bc^. Anterior body-cavity, communicating witii exterior by the water-pore, be-, bc^. Second and third body-cavities of Tornaria. Circular ciliated liand of Tornaria. Contractile cord between apical jilate and anterior body-cavity of Tornaria. Gill-pouches. Hydrocoel of Auricularia (anterior body-cavity), Longitudinal (circumoral) ciliated band. Left enterocoel (body-cavity), m. Mouth. «. Lateral (paired) nerve-band of Auricularia. Right enterocoel. sp. Calcareous spicules, st. Stomach. •u>p. Water-pore. — In Auricularia, the margin of the mouth is surrounded by a ciliated band discovered l)y Skmon, and known .as the adoml ciliated band. The poste- rior, V-shaped portion of this band lies inside on the ventral floor of the larval larva this cavity arises as a median pouch of the arche. - teron, and there is every reason to suppose that it has a similar origin in Tornaria, although this point has not yet. 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 Willey, Arthur, 1867-1942. New York; London : Mcmillan
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfishes, bookyear1894
