PLUTEUS 



Fig. 10. How the contents of the egg may be traced into the embryo 

 (pluteus). Upper left diagrams the egg: A = animal pole; V = vegetal pole. 

 Following down left side are the 2-cell, 4-cell, 8-cell, and 16-cell stages. Top 

 right shows a section of a blastula with the cells from the vegetal pole entering 

 the cavity of the blastula. Immediately below is a gastrula with the archenteron. 

 Finally, we see the pluteus with the pigment band localized in the gut. 



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