. A manual of zoology. Zoology. V. HOLOTHUROIDEA 307 It passes backwards in the median dorsal interradius, forward in the left ventral interradius, and then back in the right dorsal interradius to the anus. It is held in position by mesenteries (fig. 309), and near the anus by numerous muscular filaments. Into the terminal portion one or two / h I d. Fig. 308.—Anatomy o£ Caudina aienala (after Kingsley). a, anastomoses of dorsal blood-vessel; b, branchial tree; d, dorsal blood-vessel;/, mesenterial filaments; g, genital opening; i, alimentary canal; I, longitudinal muscles; in, mouth; o, genit
. A manual of zoology. Zoology. V. HOLOTHUROIDEA 307 It passes backwards in the median dorsal interradius, forward in the left ventral interradius, and then back in the right dorsal interradius to the anus. It is held in position by mesenteries (fig. 309), and near the anus by numerous muscular filaments. Into the terminal portion one or two / h I d. Fig. 308.—Anatomy o£ Caudina aienala (after Kingsley). a, anastomoses of dorsal blood-vessel; b, branchial tree; d, dorsal blood-vessel;/, mesenterial filaments; g, genital opening; i, alimentary canal; I, longitudinal muscles; in, mouth; o, genital duct; p, pharyngeal ring; r, gonads, cut away on right side; t, ampulla; of tentacles; V, ventral blood-vessel. branchial trees may empty. These are tubular sacs with small branched outgrowths which are filled with water. They are respiratory, and are periodically filled with fresh water. In many species 'Cuvierian organs' occur; these are morphologically specially modified portions of the branchial tree and are either connected with them or separately with the. 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
