Colleije 

 Zoology 



Frontispiece A colorful tidepool community on 

 a rocky shore ofF the coast of California. The 

 beautiful pink and orange sea anemones are 

 so-called because of their resemblance to flow- 

 ers. Perched on a rock are two edible mussels, 

 Mytilus edulis. In the lower left-hand corner 

 is a hermit crab with its soft tail tucked into an 

 empty shell for protection. As the crab increases 

 in size, it moves into a larger shell, and wher- 

 ever it goes the shell travels with it. (Photo 

 courtesy of M. Woodbridge Williams.) 



