. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. i8o FLORENCE PEEBLES, water, or if they do they may be too complex in character to be disassociated from the molecules that hold them. Even if they do pass into the water the cells of the eggs developing in their presence may not be permeable to them. In Fig. I the rate of the appearance of the first three furrows is shown in contrast to the rate of cleavage of eggs in embryo-water. The delay here would. no FIG. i. Comparison of the rate of appearance of the first three cleavage planes (I., II., and III.) in normal eggs
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. i8o FLORENCE PEEBLES, water, or if they do they may be too complex in character to be disassociated from the molecules that hold them. Even if they do pass into the water the cells of the eggs developing in their presence may not be permeable to them. In Fig. I the rate of the appearance of the first three furrows is shown in contrast to the rate of cleavage of eggs in embryo-water. The delay here would. no FIG. i. Comparison of the rate of appearance of the first three cleavage planes (I., II., and III.) in normal eggs (O), and in eggs allowed to de- velop in Embryo-water (A). The abscissa shows the number of minutes from insemination to the appearance of the furrow in 50 per cent, of the eggs. The ordinate gives the cleavages. indicate that inhibiting substances had accumulated in the water. Vernon ('95) found that larvae grown in water in which other larvae had previously developed were seven per cent, smaller than normal, showing that some of the products of metabolism exert a deleterious effect on growth, but he found that urea and uric acid caused increase in size. He states that a small excess of carbon dioxide stimulated growth, but Haywood ('27) has found that excess of carbon dioxide delays the appearance of the first furrow. In Fig. 2 the average rate of growth in length of the plutei, measuring from the base of the body to the tip of one of the anal. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
Size: 1914px × 1305px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
