242 MYTILUS. MUSSEL, Class VI. 



17. PLICA- Gm. Lin. 3358. Moni. Test. Br. Sup. 70. 



TUS. 



M. with a very thin pellucid rhomboidal shell, 

 slightly plaited and wrinkled, truncated on one 

 side close to the tnnbo ; length less than half an 

 inch ; breadth double its length. 

 Isle of Sky. 



