TABLE III. 



List of the most important differences in Animal Egg-cleavage and 

 Gastrnlation. 79 



The letters a-f indicate the 6 animal tribes (the primitive animals being 

 excluded) : a, Plant-animals ; b, Worms ; c, Soft-bodied animals (Mollusca) ; 

 d, Star-animals (Echinoderma) ; e, Articulates (Arthropoda) ; f, Vertebrates. 



VOL. 



