Cuttle-fish Oysters, Crabs, etc. 31 



The sword-fish is found in the Atlantic 

 Ocean and the Mediterranean Sea. 



(Whenever the blackboard will admit of it, the drawings 

 should be made full size.) 



52. Here is still another very curious fish. It 

 is a cuttle-fish, which has eight long arms for 

 seizing other creatures which it captures for 

 food. When pursued, it discolors the water all 

 about it with an inky substance, which enables 

 it to conceal itself and escape from its enemy. 

 (See p. 27.) 



53. Do fishes breathe air ? They do. Do they come to 

 the surface of the water for air, as whales, seals, and por- 

 poises do ? They do not. Where do they find air to 

 breathe ? In the water. Does all water contain air ? It 

 does. Fishes have gills ; animals, lungs to breathe with. 

 The blood of fishes is cold, while that of animals is warm. 



54. There is a kind of fish caught in salt 

 water called shell-fish. Can you name some of 

 this kind ? Oysters, clams, crabs, and lobsters. 

 These are also found near shore in great quan- 

 tities and sold almost everywhere, either fresh or 

 preserved. Oysters are usually found adhering 

 to rocks or in the sand in salt water. 



Do any of you know what kind of a jewel, worn exten- 

 sively by ladies, is found in some oysters ? The pearl. 



SPELL AND DEFINE Shell-fish, cuttle-fish, 

 captures, pursue, conceal, escape, enemy, breathe, 

 crab, oyster, lobster, lungs. 



