Report oN THE InvestiGarrons carried on during 1900 in 
. connection with the Lancasnire Sa - FIsHerres 
Laporarory at University College, Liverpoo!, and 
the Sea-Fisu Harcuery at Piel, near Barrow. 
Drawn up by Professor W. A. Herpman, F.R.S., Honorary 
Director of the Scientific Work ; assisted by Mr. ANDREW 
Scorr, Resident Fisheries Assistant at Piel, and Mr. 
JAMES JOHNSTONE, B.Sc., Fisheries Assistant at Liverpool. 
With Nine Plates, and other Illustrations. 
: CONTENTS. 
. Introduction and General Account of the Work — - = ] 
1 
2, Required Survey of Fishing Grounds © - = : - 16 
3. Fish Hatching at Piel - 2 2 - = = 31 
4. Note on the Spawning of the Mussel — - - - . 36 
5. Statistics of the Mersey Shrimping Grounds - - : 39 
6. Report on Deposits and Shrimps — - - - - : 56 
7. Note on a Sporozoon Parasite of the Plaice — - - - 59 
8. On the Fish Parasites Lepeophtheirus and Lernca- - 63 
Inrropuction AND GENERAL ACCOUNT OF THE Work. 
Ixy the main the work of the past year has been 
similar in its nature to that of the previous one, and has 
consisted in: — 
(1) The hatching operations and other work carried out 
at Piel by Mr. Andrew Scott; 
(2) Laboratory investigations by Mr. Johnstone at 
Liverpool ; 
(3) Certain observations at sea taken from the steamer, 
at Piel, at the Isle-of-Man, and at various other points in 
the district, by Mr. Dawson, Mr. Ascroft, and others—all 
discussed and reduced to order at the Liverpool 
Laboratory ; 
(4) The work of the circulating Fisheries Kxhibit : 
(5) Practical laboratory classes at University College, 
Liverpool, for fishermen ; and 
