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Fig. g. — Development of the newt's egg. (a) The blastula in its membranes, (b) View from 

 underneath of the early gastrula showing the beginning of the blastopore, {c) Later view of the 

 round blastopore, {d) View from above of the slit-like blastopore at the end of gastrulation. 

 {e) Later view showing the open neural plate 



