HAIRY CRAB from the 

 Gulf of California, 

 Pilumnus townsendi, 

 shows one of the myriad 

 forms of camouflage 

 which nature provides 

 for the countless species 

 of crustaceans. 



PEBBLE CRAB from the 

 Galapagos, D a i ra 

 americana, usually is 

 found on brown, peb- 

 bly bottom where his 

 form and color secure 

 him maximum protec- 

 tion from marine 

 enemies. 



107 



PURPLE SPIDER crab, 

 found only in the 

 Galapagos, Mithrax 

 nodosus, is another 

 crab protected by both 

 color and armament. 

 Animals like these have 

 power to regenerate 

 legs and claws lost in 

 battle or by accident. 



