446 



DISTRIBUTION IN SPACE AND TIME 



Fig. 1301. Group of Deep-Sea Animals. In foreground a Sea-Cucumber on left, and a Coral (Lophohelia) on 

 right. At back Venus' Flower-Basket (Euplectetta) on right, two Sea-Lilies (Rkizocrinusz.n& Pentacrinus] in centre, 

 and on left. In the middle a Pelican Fish (Saccopharynx pelecanoides). 



The Stopper-Fisted Hermit-Crabs (Pylocheles) of the Indian 

 Ocean and Caribbean Sea do not possess the twisted tails of 

 our common native species, which live in cast-off snail-shells, 

 nor is one of the pincers much larger than the other. These 

 particular hermits are in all respects symmetrical, in adaptation 



