SPECIALIZATION 325 



intelligent American should know. It is here, and here only, 

 that "specialization" may properly begin! Behind lie the 

 Mammals, Birds, Reptiles and Fishes; beyond lie the mighty 

 hosts of the Invertebrates — Crustaceans, Insects, Mollusks 

 and others. In any one of these grand divisions of life the 

 special student may wander for a lifetime in a wonderland 

 of his own, and to the last find each day filled with new light 

 and new joys in the unending revelations of Nature. 



