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The Trematode Parasites of Fishes from the 

 English Channel. 



By 

 William NicoU, M.A., D.Sc, M.D. 



Witli Ficrui-es 1-6 in the Text. 



In continuation of my researches on the entozoa of British marine fishes 

 I spent two months (August and September, 1909) at the Plymouth 

 Marine Biological Station. By the courtesy of the Government Grant 

 Committee of the Koyal Society, a table was placed at my disposal and 

 all expenses in connection with the investigation were defrayed. 



Hitherto few observations have been made upon entozoa from fishes 

 of the south coast. The area, however, is of considerable interest from 

 a faunistic point of view, for it contains several species of fish which 

 are uncommon or unknown on other parts of our coast. In addition it 

 is richer in species than either the east or the west coast. The influx 

 of Mediterranean forms adds further interest. 



During the course of these two months 419 fish belonging to 70 species 

 were examined. Later, further consignments were sent to me in London. 

 These comprised an additional 56 fish with an additional 9 species. The 

 total number with which this investigation deals is therefore 475 fish 

 and 79 different species. Amongst these, Acanthopterygian fishes 

 figured most largely. The various groups were represented as follows : — 



Species. Fishes. 



Acanthopterygii 



Pharyngognathi 



Anacanthini 



Physostomi 



Lophobranchii . 



Elasmobranchii 



Total 



Amongst these 79 species there were 37 which I had not previously had 

 an opportunity of examining, and the majority of them afforded interest- 

 ing new records. 



