230 



CUTTLE-FISH, MOLLUSC A, ETC. 



sesses an ink-bag its contents are rarely poured forth ; 

 but when alarmed, the ink-bag is emptied suddenly, 

 and the water is then so beclouded with the inky 



Fig. 157. 



" Devil Fish " (Octopus vulgaris). 



Fig. 158 



Horny jaws, or mandibles of Cuttle fish. 



fluid that the cuttle-fish can make its secure escape 

 whilst the water is disturbed. The octopus has the 

 peculiar power of changing the tints of its skin, ac- 

 cording to those of the ground it may be reposing 



