. Journal of morphology. entric aggregationof pigment, also presence of second polar body (X 15). Figs. 4-12. Successive stages of cleavage from living egg (X 15). Figs. 13-18. Successive stages of cleavage in superior hemisphere of livingegg, showing order and time of appearance (X 15). Heavy black line indicatesthe first cleavage; heavy black broken line, second cleavage; blue line, thirdcleavage; heavy red line, fourth cleavage ; black dotted line, fifth cleavage; reddotted line, sixth cleavage; light black line, seventh cleavage. Numerals indicatetime of first appearance of the furrows. Fi
. Journal of morphology. entric aggregationof pigment, also presence of second polar body (X 15). Figs. 4-12. Successive stages of cleavage from living egg (X 15). Figs. 13-18. Successive stages of cleavage in superior hemisphere of livingegg, showing order and time of appearance (X 15). Heavy black line indicatesthe first cleavage; heavy black broken line, second cleavage; blue line, thirdcleavage; heavy red line, fourth cleavage ; black dotted line, fifth cleavage; reddotted line, sixth cleavage; light black line, seventh cleavage. Numerals indicatetime of first appearance of the furrows. Fig. 19. Meridional section of egg in stage corresponding to Fig. 7, showingearly segmentation cavity (x 20). Fig. 20. Meridional section through the centers of least and most denselypigmented areas in stage corresponding to Fig. 9 (X 30). Figs. 21, 22. Meridional sections through same areas, showing thickening ofroof in densely pigmented area, and thinning at opposite side (X 35, 40). Jonnuil of Moi-pIioJoijij Jo/
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Keywords: ., bookcentury1800, bookdecade1, booksubjectphysiology, bookyear1887
