284 CRUSTACEA. 



Fighting is very common, but the loss of limbs is readily 

 repaired. 



Deep sea Crustaceans are very abundant, and often 

 remarkable " for their colossal size, their bizarre forms, and 

 brilliant red colourings ; " some are blind, others are 

 brilliantly phosphorescent. Yet more abundant are the 

 pelagic Crustaceans (especially Entomostraca and Schizo- 

 pods) ; they are often transparent except the eyes, often 

 brightly coloured or phosphorescent. Many Crustaceans 

 live on the shore, and play a notable part in the struggle 

 for existence which is so keen in that densely crowded 

 region. The lower Crustaceans are abundantly represented 

 in fresh water, in pools, streams, and lakes. A few, such as 

 wood lice and land crabs, are terrestrial, and some blind 

 forms occur in caves. 



