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HANDBOOK OF INVERTEBRATE ZOOLOGY. 



n 



ab 



FIG. 80. 



FIG. 80. Ventral view of an older larva. (Drawn from nature by 

 E. B. Wilson. ) 



am. Ambulacral area of developing starfish, ab. Ab-oral area of 

 developing starfish, ab 1 , ab 6 . Its free ends. 



Other letters as hi Fig. 78. 



