I5() TEANSACTIONS LIVBEPOOL BIOLOGICAL SOCIETY. 



Occurrence of R a r p Fishes. 

 Several rare fishes have turned up during the last 

 year. Two scarce rays, Raia fvllonica and Raia micro- 

 cellata were recorded for the first time (with certainty) 

 from Carnarvon and Cardigan Bays ; a sole, the sand sole 

 (Solea lascaris), which does not often occur in our area, 

 was taken also in Cardigan Bay. Finally several young 

 specimens of De/itc.v 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 off Pwllheli last 

 September. In many ways the occurrence of rare animals 

 last year 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 observations upon 

 ectoparasites of fishes at the Piel Laboratory ; and a 

 number of tapeworms and " flukes " from the intestines 

 of fishes have been investigated by Mr. -Johnstone in the 

 University Laboratory; all of these are described and 

 figured further on in this Beport. A peculiar disease 

 infesting plaice at the Port Erin Hatchery, and causing 

 considerable mortality, lias been traced to a fungus which 

 inhabits the liver and kidneys of the fishes, and destroys 

 the tissues. 



Shell-fish Tr ansfla x tation . 



The result of the mussel transplanting operations in 

 the spring of 1905 lias proved satisfactory. The mussels 

 taken from Hie llevshani beds and deposited in the 

 Etinghole " (between the <>1<1 harbour and the West end 

 pier at Morecambe) have grown on an average about 

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

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



