67 



8. Oysters kept in Copper solutions. 



9. Oysters kept in Iron solutions. 



10. Shell perforated by a boring Mollusc. 



11. Weak and deformed shells. 



12. Fresh water Mussels showing erosion of shell. 



13. ,, ,, showing formation of pearls. 



H. V. Mussel Culture Abroad. 



1. Illustrations of the Bouchot system at the 



Bay of Aiguillon on west coast of France. 



2. Illustrations of the vertical system in Bay of 



Spezia, Italy. 



3. Mud from Mussel bouchots at Charrons. 



4. Model of Mussel bouchot. 



5. Mussel adhering by its byssus. 



H. VI. Our Mussel Beds. 



1. Chart of district showing mussel beds. 



2. Sample of mud from bed between Scarfhole 



and Duddon. 



3. Sample of mud from bed north side of Scarf- 



hole, near Barrow. 



4. Sample of mud from bed south side of Scarf- 



hole, near Barrow. 



5. Sample of mud from Walney side, upper end 



of Scarfhole. 



6. Sample of mud from Head Scar, Barrow 



Channel. 



7. Sample of mud from Foulney bed, near Piel. 



8. Sample of mud from Koosebeck outer Scars, 



near Piel. 



9. Sample of mud from bed between Koosebeck 



and Baicliff. 



