Eledone eledone00isgr Year: 1909 00 are cells of the germinal wall, which sink below the general epithelium, and then protrude into the ovary, pushing the wall before them until they are completely surrounded by an epithelial layer, several cells thick. The egg itself becomes surrounded by a special nourishing or follicular layer, at the expense of the surrounding cells. With the growth of the ovum, this layer becomes actually folded into the egg substance (PI. IX, fig. Cub. foil.), to increase its surface of contact with the ovum. Further protrusion and folding of the germinal wall gives ri
Eledone eledone00isgr Year: 1909 00 are cells of the germinal wall, which sink below the general epithelium, and then protrude into the ovary, pushing the wall before them until they are completely surrounded by an epithelial layer, several cells thick. The egg itself becomes surrounded by a special nourishing or follicular layer, at the expense of the surrounding cells. With the growth of the ovum, this layer becomes actually folded into the egg substance (PI. IX, fig. Cub. foil.), to increase its surface of contact with the ovum. Further protrusion and folding of the germinal wall gives rise to the characteristic racemes (PL Y, fig. 41, egg. R-). Finally the follicle secretes the chorion round the mature ovum, which now escapes, bursting through the covering layers (fig. Q7b, C. T.), and then passing out by the oviduct. Fig. VII. Fig. VII.âC. â pen. 'Nt Fig. VII. âMale reproductive organs of young E. aldrovandi. A, fr ventral side ; B, genital duct as in situ, dorsal view; C, genital duct unravel to show various regions ; x 2. oni unravelled II. Male. It is not proposed to give a detailed account of the male genital organs of Eledone, as no male specimen of I''., cirrosa could be obtained. However, the following description of an immature male E. aldrovandi will
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