. The Bashford Dean memorial volume :. Fishes; Sharks; Fishes, Fossil. The Embryology of Chlamydoselachus 575 and table of measurements of his own four embryos are so involved that I can make out little about them. He had four embryos measuring , 18, and 24 inches respec tively and all in about the same stage of development. His detailed yolk'sac measurements are unintelligible to me—one wishes for diameters such as those given above. Shann states that one of the largest embryos he examined "was a female measuring inches and the yolk sac was still of enormous bulk". T
. The Bashford Dean memorial volume :. Fishes; Sharks; Fishes, Fossil. The Embryology of Chlamydoselachus 575 and table of measurements of his own four embryos are so involved that I can make out little about them. He had four embryos measuring , 18, and 24 inches respec tively and all in about the same stage of development. His detailed yolk'sac measurements are unintelligible to me—one wishes for diameters such as those given above. Shann states that one of the largest embryos he examined "was a female measuring inches and the yolk sac was still of enormous bulk". This is confirmed by his roughly^drawn. Text-figure 20 Egg and embryo of an Isurid shark (Laynna sp.) obtained in the Sagami Bay by Franz; Doflein The embryo was 553 mm. ( in.) long. The yolk sac measured 211 mm. ( in.) x 123 mm. ( in). The whole weighed kg. = lbs. After Lohberger, 1910, Fig. 1, pi. I. figure which shows that the word ''enormous" is correctly used. The yolk reaches almost from the angle of the jaw to the base of the caudal fin. He judges that at birth the young fish would be approximately 30 inches from tip to tip. Other Isurids have large embryos on huge yolk sacs. Two cases will be indicated. Sanzo (1912) figures and describes from the Mediterranean the intra-uterine embryo of Carcharodon rondeletii, the great white shark or ''man-eater". The embryo was 361 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 Dean, Bashford, 1867-1928; Gudger, E. W. (Eugene Willis), 1866-1956. New York : [American Museum of Natural History],
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