68 



THE ANIMALS AND MAN 



Fig. 26. Diagrams showing fundamental structure of types of several 

 animal phyla: 1, sea-anemone; 2, starfish; 3, worm; 4, centiped; 

 S, clam; 6, honeybee; 7, salamander. In each figure the central 

 nervous system is indicated by the black lines. (After Haeckel.) 



