. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 148 ALICE M. BORING. tubules and the count of cells includes the triangular space between three tubules. There is very little difference in the space width of 147 and 2323, but the triangles of 2323 are de- cidedly smaller. This difference in tubule size is so striking and seems so strange in birds so nearly alike in other ways, that I tried to find any possible other explanation than that of individual varia- tion. It occurred to me that possibly the size of tubules might vary in different parts of the testes, and as the pi
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 148 ALICE M. BORING. tubules and the count of cells includes the triangular space between three tubules. There is very little difference in the space width of 147 and 2323, but the triangles of 2323 are de- cidedly smaller. This difference in tubule size is so striking and seems so strange in birds so nearly alike in other ways, that I tried to find any possible other explanation than that of individual varia- tion. It occurred to me that possibly the size of tubules might vary in different parts of the testes, and as the pieces of testes first sectioned were cut out of the organ without any reference to position the probability is that they were from different parts in the four different testes. However, in two birds killed, I carefully fixed pieces from the periphery and from the center of the organ, as these two regions would represent any difference in pressure conditions or in growth. The sections of these pieces. FIG. 5. Triangular space of interstitial tissue in cf 666, showing many nuclei of different shapes and staining capacity, also many fat globules arranged in rows. X 1,000. show that the tubule size is the same throughout. Though the testis from which Fig. 3 is drawn has many fully formed sperma- tozoa, it is just possible that it has not reached the climax of growth, and would eventually have contained tubules as large as those in Fig. 4. In the adult testis, the nuclei vary in shape exactly as in 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 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
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