. The anatomical record. Anatomy; Anatomy. WATER IN BRAIN OF DOG-FISH 61 are most numerous. The average percentages of water in the brains of the various groups just given are shown in table 7. TABLE 7 LENGTH WEIGHT AVEBAOE 1 year per cent per cent per cent 77 8 2 years 78 6 3 vears 78 8 4 years 79 2 5 years 77 7 , As far as the above results go, there is no great decrease in the percentage of water with increasing age. This appears contrary to what Donaldson has found in the case of the albino rat. There he found a decrease of water of 10 per
. The anatomical record. Anatomy; Anatomy. WATER IN BRAIN OF DOG-FISH 61 are most numerous. The average percentages of water in the brains of the various groups just given are shown in table 7. TABLE 7 LENGTH WEIGHT AVEBAOE 1 year per cent per cent per cent 77 8 2 years 78 6 3 vears 78 8 4 years 79 2 5 years 77 7 , As far as the above results go, there is no great decrease in the percentage of water with increasing age. This appears contrary to what Donaldson has found in the case of the albino rat. There he found a decrease of water of 10 per cent between birth and maturity. I was able to secure seventeen specimens of young Squalus acanthias, the spiny dog-fish. These fish, as may be seen in table 8, are all under one year of age. TABLE 8 Shotving sex, length, weight, brain weight and percentage of water in the brain of young Squalus acanthias. 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 Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Bremer, John Lewis, 1874- ed; Hardesty, Irving, b. 1866, ed; American Association of Anatomists; American Society of Zoologists; Wistar Institute of Anatomy and Biology. [New York, etc. ] A. R. Liss [etc. ]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
