FIG. 32.--Astacus fluviatilis.--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 poriton of the contained egg, highly magnified; ep, epithelium of ovisac; gs, germinal spots; gv, germinal vesicle; m, membrana propria; v, vitellus; vm, vitelline membrane; w, stalk of ovisac.
[Editor's note: illustration is reproduced here approximately twice the size of the woodcut in the book.]
Next> | ^Top