MUSSELS 



Edible Mussel, Mytilus edulis, showing 2 Hooked Mussel, Myliliis havtattis. 4 Horse Mussel, Modioln nwdiola. 



byssal threads by which the rnollusk ^ CaUtornin Mui?ie\, Mylilus Culilornktis. 5 Ribbed Horse Mussel, .l/o(/!o/ti /i/jcc/.f/t. 

 clings to piles of wharves, etc. 



