. The Crayfish : an introduction to the study of Zoology. THE OVAKY AND THE EGOS. 131 during the breeding season than at other times; the large brownish-yellow eggs become conspicuous in the ovar}',. Fig. 32. —JshicitsJiiviatUis.—A, a two-thirds grown egg contained in its ovisac (x 50) ; B, an egg removed from the ovisac ( x 10) ; C, a portion of the wall of an ovisac with the adjacent portion of the contained egg, highly magnified ; ej), epithelium of ovisac ; ys, germinal spots ; t/v, germinal vesicle; m., membrana propria ; V, vitellus ; vm, vitelline membrane ; w, stalk of ovisac. and the

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. The Crayfish : an introduction to the study of Zoology. THE OVAKY AND THE EGOS. 131 during the breeding season than at other times; the large brownish-yellow eggs become conspicuous in the ovar}',. Fig. 32. —JshicitsJiiviatUis.—A, a two-thirds grown egg contained in its ovisac (x 50) ; B, an egg removed from the ovisac ( x 10) ; C, a portion of the wall of an ovisac with the adjacent portion of the contained egg, highly magnified ; ej), epithelium of ovisac ; ys, germinal spots ; t/v, germinal vesicle; m., membrana propria ; V, vitellus ; vm, vitelline membrane ; w, stalk of ovisac. and the testis assumes a milk-white colour, at this period. The walls of tlie ovary are lined internally by a layer of K 2. 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 Huxley, Thomas Henry. London

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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondon, bookyear188