Edible Mussel, }fylihis ediilis, showinp; 2 

 bysKil threads by which the moliusk 3 

 clings to piles of wharves, etc. 



MUSSELS 



Hooked Mussel, Mytilus haniatits. 4 



Californiu Mussel, Mylihis CaJijorniciis. 5 



Horse Mussel. Modiola mod'wla. 



Ribbed Horse Mussel, Modiola pHcaluh. 



