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O r (• u r r e n (• of Rare Fishes. 



Several rare iishes have turned up during' the last 

 year. Two scarce rays, Haia fuUonica and l^ala inicro- 

 cellata were recorded for the hrst time (with certainty) 

 from Carnarvon and Cardigan Ba3's ; a sole, the sand sole 

 (So/ea lascaris), which does not often occur in our area, 

 was taken also in Cardigan Bay. Finally several young 

 specimens of Dentex vulgaris, a fish which has not been 

 seen in the Irish Sea area before, and is a Mediterranean 

 rather than an English species, was taken olf Pwllheli last 

 September. In many ways the occurrence of rare animals 

 last 3'ear was somewhat remarkable, and is to be con- 

 nected with an exceptional northerly movement of 

 sub-tropical Atlantic water. 



Parasites and Diseases of Fishes. 



Mr. Scott has been making some observatiojis upon 

 ectoparasites of fishes at the Piel Laboratory ; and a 

 number of tapeworms and " flukes "' from the intestines 

 of fishes have been investigated b}' Mr. .Johnstone in the 

 University Laboratory; all of these are described and 

 figured further on in this Eeport. A peculiar disease 

 infesting plaice at the Port Erin Hatchery, and causing 

 considerable mortality, has been traced to a fungus which 

 inhabits the liver and kidneys of the fishes, and destroys 

 the tissues. 



Shell-fish TRA^■sPLANTATION. 



The result of the mussel transplanting operations in 

 the spring of 1905 has proved satisfactory. The mussels 

 taken from the Heysham beds and deposited in the 

 " Einghole "" (between the old harbour and the West end 

 pier at Morecambe) have grown on an average about 

 f of an inch in seven months. Those left on the scars 

 have only increased i of an inch in length. This gives 



