. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 422 W. R. COE DEVELOPMENT OF THE PRIMARY BISEXUAL GONADS The profusely branching tubules of the primitive gonads can be found in young oysters at the age of six to eight weeks after setting or when the shell has reached a length of 6-10 mm. They ramify within the thin layer of connective tissue immediately beneath the body walls as Stafford (1913) has previously described. In these primary gonads the germinal epithelium consists of a thin layer of morphologically undifferentiated cells which lie upon the inner side of the tu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 422 W. R. COE DEVELOPMENT OF THE PRIMARY BISEXUAL GONADS The profusely branching tubules of the primitive gonads can be found in young oysters at the age of six to eight weeks after setting or when the shell has reached a length of 6-10 mm. They ramify within the thin layer of connective tissue immediately beneath the body walls as Stafford (1913) has previously described. In these primary gonads the germinal epithelium consists of a thin layer of morphologically undifferentiated cells which lie upon the inner side of the tubular gonad (Fig. 1), while the cells which line the outer oc. FIG. 3. Primary intersexual gonad, showing primary spermatocytes (spc I) and ovocytes in synapsis, secondary spermatocytes (spc II) and several large ovocytes (oc). Age about four months. wall, adjacent to the epidermis, become differentiated into the ciliated epithelium of the genital canals (Figs. 2, 4, 5, 6) as Hoek (1883-84) so fully described many years ago for 0. edulis and as Coe (1932) verified in 0. lurida. A few weeks later the germinal epithelium shows a differentiation into larger and smaller cells. The former are soon recognizable as ovocytes by the presence of fibrillar mitochondrial bodies, while many of the latter show by their rapid proliferation and later specialization that they belong to the male germ 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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