SEA-FISHERIES LABORATORY. 177 



REPORT ON THE INVESTIGATIONS CARRIED 

 ON DURING 1912 IN CONNECTION WITH THE 

 LANCASHIRE SEA-FISHERIES LABORATORY AT 

 THE UNIVERSITY OF LIVERPOOL, AND THE 

 SEA-FISH HATCHERY AT PIEL, NEAR BARROW. 



EDITED BY 



Professor W. A. HERDMAN, F.R.S., 



Honorary Director of the Scientific Work. 



(With plates, charts and text figures.) 



Contents. pagb 



1. Introduction. By W. A. Herdman - 178 



2. Fish Hatching at Piel. By A. Scott ... 189 



3. Classes, Visitors, &c, at Piel. By A. Scott - 193 



4. Diseases of Fish. By J. Johnstone - 196 



5. Piscine Tubercle. By D. M. Alexander - 219 



6. Report on Periodic Cruises. By W. Riddell - - - 227 



7. Report on the Plankton of the Periodic Cruises of the 



" James Fletcher " in 1912-1913. By W. Riddell - 235 



8. Report on Plaice Measurements. By J. Johnstone - 245 



9. Experiments with Marked Plaice. By J. Johnstone - 270 



10. Hydrographic Investigations and the Irish Sea Fisheries, 



with charts. By J. Johnstone 275 



11. Salinities in the Irish Sea during 1912. By H. Bassett - 327 



12. Plankton of the West Coast of Scotland in relation to 



the Irish Sea — Part III. By W. A. Herdman and 



W. Riddell - 344 



13. Intensive Study of Plankton around South end of Isle 



of Man— Part VI. By W. A. Herdman, A. Scott and 



H. M. Lewis - 372 



14. On Pelagic Fish Eggs collected off South-West of Isle 



of Man. By A. Scott ------- 409 



15. Decapod Larvae in the Irish Sea. By H. G. Jackson - 430 



16. Report on Mussel Beds and Sewage. By J. Johnstone - 436 

 M 



