82 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



on the inner branches, 3-jointed on the outer, the setae 

 of first foot (fig. 8) being non-plumose, the others (fig. 9) 

 densely plumose, and having the characteristic Acartia 

 spinal termination to outer branch. 



The female 5th feet (fig. 10) of this species differ from 

 the general character of the other known species of 

 Acartia in being 2-jointed, whereas, in the other species, 

 they are rudimentary. The stout basal joints bear a long 

 plumose seta on each outer side. The terminal joints, which 

 are about three times as long as broad, have a short central 

 spine on the outer side, and a very long gracefully curved 

 spine placed centrally on the inner side, also two short 

 terminal spines. 



Three specimen only of this evidently quite distinct 

 species were taken in the St. Lawrence, about 100 miles 

 from Quebec. The unfortunately mutilated condition of 

 the anterior antennae renders any accurate description of 

 thein impossible, but the 5th pair of swimming feet are 

 sufficiently diagnostic of the species. 



Conclusion. 



By W. A. Hekdman. 



This method of collecting samples of the surface fauna, 

 from an ocean liner going at full speed, in any required 

 number and quantity per day or hour, was first practised, 

 I believe, by Dr. John Murray, in a traverse of the Atlantic 

 from Glasgow to New York in 1892, and afterwards in a 

 trip through the Bay of Biscay, and the Mediterranean. 

 From my experience I can entirely confirm the opinion 

 expressed to me by Dr. Murray, that this plan of collecting 

 is simple, effective, and inexpensive. It requires no com- 

 plicated apparatus ; there is no difficulty in the mani- 

 pulation, and no trouble to speak of need be given to any 



