254 



TEXTBOOK OF ZOOLOGY 



the river, pond, or lake, and lie with their jaws agape, or snap 

 their jaws on any object. If the soft filament of a fish's gill or a 

 fin of the fish comes in contact with the glochidium, it will close 



o 



ft) 

 d 



t 



c 

 (\) 



u 



S 



■^7 <3 -Q o "Td cy 



00 



o 

 o 

 e 



05 



a. 

 S 



B 



Si 



o 



■*-> 



03 



0) 



U5 





rijriiliiiK'v..,! 



down upon it and remain attached if the fish is the suitable host 

 for the particular species of clam. The tissues injured due to the 

 attachment of glochidia produce by proliferation new cells which 



I 



