PLATE 258. 



Fig. J. 



Kg. 4. 



ri„ 5 



Fig. 6. 



Fig. 2. 



MUSSELS AND SEA CLAMS. 



Fig, 1. The Beach Clam or Hen Clam, SpisuUi soUdissima, 

 p. 708. 



Natural size. 

 Fig. '2. The Sea Clam, Cyprina islandica. 



Natural size. 



Fig. 3. The Mus.sel, Alijtilus edulis, 13. 709. 

 Fig. 4. The Black Horse Mussel, Modiola nigra. 

 Fig. 5. The Rough Mussel, Modiola plicatula, p. 709. 

 Fig. <i. The Horse Mussel, Modiola modiolus, p. 709. 



