95 



[WORK FROM THE PORT ERIN BIOLOGICAL STATION.] 



KECENT ADDITIONS to the COPEPODA of 



LIVEEPOOL BAY. 



By Isaac C. Thompson, F.L.S., F.E.M.S. 



With Plates VI and VII. 



[Read November 9th, 1894.] 



Since the Revised Report on the Copepoda of Liverpool 

 Bay was published last year, twenty-four species new to the 

 district have been recorded, one of these, Pseudocyclopia 

 stephoides, being new to science. 



Surface tow-nets have been continuously employed 

 during the several marine expeditions undertaken by the 

 Committee, also tow-nets attached to the rope a few 

 fathoms above the dredge. The latter device has proved 

 a success, collecting some good species of Copepoda, as 

 well as Cumacea and Amphipoda, which are seldom or 

 never obtained on the surface. Amongst the Copepoda 

 thus obtained were several specimens of Pseudocalanus 

 armatus, found along with a shoal of Pseudocalanus 

 elongatus. A widely extending shoal of Anomalocera 

 patersonii was observed off the Isle of Man in May, the 

 only occasion on which we have taken this species during 

 the year. On several occasions, notably in the early part 

 of June, the surface organisms have been singularly scarce. 



Special care has been taken to wash and sieve through 

 fine silk as much as possible of the material brought up 

 by the dredge during marine expeditions, and it is by this 

 means that several of the above-mentioned Copepoda, new 

 to the district, have been obtained, as well as the new 

 species Pseudocyclopia stephoides. 



