Survey of the Animal Kingdom 323 



FAGURU5 



LIBINIA 



Fig. 132. — Representative crabs of the class Crustacea, phylum Arthropoda. 

 Fiddler crab {Uca); blue edible crab (Callinectes) ; hermit crab { Pa gurus.) ; 

 spider crab (Libinia) . (Copyright by General Biological Supply House, Inc., 

 Chicago. ) 



Cirri -- 



■> shell plates . 



_-3talK 



Fig. 133. — Barnacles of the class Crustacea, phylum Arthropoda. 



