164 



ANIMALS OF LAND AND SEA 



the smaller jelly-fishes, the ctenophores, and the very few 

 pelagic echinoderms. 



Upon these larger animals, but especially upon the fishes, 



live very large and 

 formidable jelly- 

 fishes, many kinds of 

 fishes ranging in size 

 up to the basking, 

 whale and other giant 

 sharks reaching a 

 length of from 40 to 

 70 feet, the smaller 

 members of the whale 

 tribe, the porpoises, 

 dolphins, etc., and 

 the squids and cut- 

 tlefish, some of which 

 are very large, one 

 reaching a length of 

 55 feet. The squids 

 and cuttles form al- 

 most the entire food 

 of the great sperm 

 whale, the bottle- 

 nose, and the other 

 toothed whales. 



The fishes are the 

 most omnivorous of 

 all sea creatures, 

 some kind or other 

 eating every sort of 

 oceanic creature and every other product of the sea. 



Jelly-fishes are sometimes of enormous size, ranking with 

 the largest of sea animals. At Nahant, Massachusetts, Pro- 

 fessor Louis Agassiz measured one in which the bell was seven 

 and a half feet across and the tentacles more than 120 feet in 



Figs. 467-470. The House Centipede, the 

 Fire-brat, and two Collembolans. 



For explanations of the figures see p. xxv. 



