. Zoology. Zoology. Fici. Wi.—Cestracion, or Port Jackson Shark. From LUtken's Zoology. fishes or other marine animals. Hence their own forms are gigantic, soft, not protected by scales or armor, as they have few enemies. Hence they do not need a high degree of intelligence, nor special means of defence or .—Mackerel Shark. though from their activity the circulatory system is highly developed, the muscular aortic bulb being provided within with three rows of semi-lunar valves. The eggs of sharks and rays are very large compared with those of bony fishes. The Ciestracion (Fig. 185)
. Zoology. Zoology. Fici. Wi.—Cestracion, or Port Jackson Shark. From LUtken's Zoology. fishes or other marine animals. Hence their own forms are gigantic, soft, not protected by scales or armor, as they have few enemies. Hence they do not need a high degree of intelligence, nor special means of defence or .—Mackerel Shark. though from their activity the circulatory system is highly developed, the muscular aortic bulb being provided within with three rows of semi-lunar valves. The eggs of sharks and rays are very large compared with those of bony fishes. The Ciestracion (Fig. 185) is an old- fashioned form, which inhabits the Australian 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. N. Y. , Holt
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1897
