260 



CONCHIFERA. 



obtaining, by one stroke of the axe, a large supply, 

 for if the branch has many offsets, the load will be 

 enough for any one man to carry. 



The File-shells (Lima) usually live at the bottom 

 of shallow seas, with the valves widely extended and 



Fl'J. 196.— LDIA. 



thrown flat back, like the wings of certain butterflies 

 when basking in the sun ; but wdien disturbed, they 

 start up, flap their light shells, and move rapidly 

 through the water, by a succession of sudden jerks. 



