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SOME EECENT ADDITIONS to the COPEPODA of 



LIVEKPOOL BAY. 



By I. C. THOMPSON, F.L.S., and ANDREW SCOTT. 



With Plate VIII. 



[Read November 10th, 1899.] 



The collection and examination of tow-net and dredged 

 material, which is carried on more or less continuously at 

 Port Erin, Isle of Man, and in the vicinity of Piel, Lan- 

 cashire, still proves a means of adding fresh names to the 

 extensive list of species from the district, which was 

 published in connection with the meeting of the British 

 Association in Liverpool in 1896. That list represents all 

 the species of marine animals and plants recorded by the 

 workers of the L.M.B.C. during the first ten years of its 

 history, and practically brings us down to the end of 

 1896. We now wish to place on record the various additions 

 to the list of Copepoda that have come under our notice 

 during the three years that have passed since the complete 

 list was published. 



The present report represents an addition of fifteen 

 species new to the district, including one new to science, 

 Leptopsyllas herdmani (PI. VIII.), and five species of 

 Copepod fish parasites. Of these, two are open sea free- 

 swimmers, the other (non-parasitic) species have either been 

 obtained from dredged material or by digging holes in the 

 shore between tide marks, the water being allowed to collect, 

 and then bailed out, pouring it out through a fine sieve. 



1. Gandacia pectinata, Brady, Copepoda of the British 

 Islands, vol. I., p. 49, PL VIII. and X., 1878. 

 This species was taken in the open sea near Port Erin 

 in January last, and on several occasions during June and 



