56 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



through sieves and gauze bags to separate the miuute 

 bottom-living Copepoda, and he opened the molluscs and 

 fish that we trawled to examine them for parasitic forms. 

 I have seen him secure some good specimens from the gills 

 of fish in passing through the fish market at Douglas, on 

 the way from the steamer to the train. His pockets 

 seemed always to contain little bottles and tubes, into 

 which specimens could be popped ; and the result of all 

 this was that he rarely went out without finding some- 

 thing, and nearly every expedition yielded new species or 

 specimens of great interest. It was a common occurrence 

 for him to ring me up on the telephone on a Sunday after- 

 noon to announce what he had just found under the 

 microscope, as the result of Saturday's expedition. He 

 was an accurate worker, and yet a rapid worker. I was 

 often astonished at the amount of work he got through in 

 the scanty leisure of an active business life. He had, I 

 consider, a good eye for species. His critical remarks 

 both on those who split up species unduly and on those 

 who fail to recognise the differences between allied but 

 distinct forms were valuable, and he showed a sound, 

 reliable judgment on the essential characters and affinities 

 of the new forms he discovered. 



Thompson's early papers on the Copepoda dealt with 

 the species found in Liverpool Bay and other parts of the 

 Irish Sea, and in 1893 he published a " Revision " of our 

 local Copepoda, with twenty-one plates, in which 13b' 

 species, of which eighteen were new to Britain and eleven 

 new to science, are recorded. The number was increased, 

 as the result of his own work and that of Mr. Andrew 

 Scott, to 246 species in his Southport British 

 Association list of 1903. As the result of his own 

 and his friends' vacation travels, however, he also 

 published papers on the Mediterranean and Norwegian 



