. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HARLEQUIN LOBE OF DISCOCEPHALIXI sex chromosomes. So far as the diploid complement of chromosomes is concerned, there is no perceptible difference, both having an outstandingly large pair of auto- somes and a Y that is the smallest of all the chromosomes. However, already in the spermatogonial resting phases there is a less extensive heteropycnosis in .\fecis- torhinus triptcrus, for then as well as later there are never more than two hetero- pycnotic bodies (instead of from three to five). The spermatogenesis in the normal
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HARLEQUIN LOBE OF DISCOCEPHALIXI sex chromosomes. So far as the diploid complement of chromosomes is concerned, there is no perceptible difference, both having an outstandingly large pair of auto- somes and a Y that is the smallest of all the chromosomes. However, already in the spermatogonial resting phases there is a less extensive heteropycnosis in .\fecis- torhinus triptcrus, for then as well as later there are never more than two hetero- pycnotic bodies (instead of from three to five). The spermatogenesis in the normal lobes is entirely orthodox. The heteropycnosis in the large autosomes is here lack- ing entirelv and hence there is no association between them and the sex chromosomes f Fig. 45). The lack of autosomal heteropycnosis obtains also in the harlequin lobe (Figs. 46 and 47). As a consequence, when the equatorial ring is formed the two sex i 45. 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
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