The embryology and metamorphosis of The embryology and metamorphosis of the Macroura embryologymetamo00broo Year: 1891] 438 MEMOIRS OP THE NATIONAL ACADEMY OF SCIENCES. percentage ot increase of wandering cells between Stages n and in is double that of the embry- onic cells. Between Stages m and iv the increase per cent of wandering cells is less than that of embryonic cells, and up to this time cell disintegration is ruled out as a disturbiu- factor aiv Fii;. 11, uinl fur details, see Table The second fact which was pointed out as characteristic of this stage, the distribution of the yolk
The embryology and metamorphosis of The embryology and metamorphosis of the Macroura embryologymetamo00broo Year: 1891] 438 MEMOIRS OP THE NATIONAL ACADEMY OF SCIENCES. percentage ot increase of wandering cells between Stages n and in is double that of the embry- onic cells. Between Stages m and iv the increase per cent of wandering cells is less than that of embryonic cells, and up to this time cell disintegration is ruled out as a disturbiu- factor aiv Fii;. 11, uinl fur details, see Table The second fact which was pointed out as characteristic of this stage, the distribution of the yolk nuclei commensurate with that of the yolk itself, also points to the conclusion already r^hcd This is well shown by two curves (Figs. 12, 13). In curve 13, which is constructed from a series ... , b 6: F,,, abowins tl,«. dlriritatfcn ,,f wan,lerin!t cells in Stage v, a. (v. Table ,., A, Anterior; P. Posierior. old reon * abundant in the thoracic-abdomiual. fold egion and in hat which answers to the future heart. We also notice the forward extension o he fuHry CellS.'ey°m ^ anttrior ed*e of the oP«e ^bes. In cut 12 the lateral extension the nuclei on side the embijo is well shown. The mouth is involved in section No 28
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