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260 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



regard to the distribution of species in the Irish Sea which 

 are contrary to our evidence; hut it is impossible to go 

 into all these cases now. Let us take Temora longicornis 

 (Muller) as a final instance. As the result of the 

 international observations, it is stated that " in the Irish 

 Sea, it can he said to he a summer form "; while the fact 

 is that on our records it occurs the whole year round from 

 January to December, attains to high numbers in early 

 spring, and remains fairly abundant into late autumn. 

 It reaches close on 7,000 in one haul on April 1st, and 

 19,000* on April 9th; and shows 1,280 and 1,600 up to 

 the 23rd of September. 



Temora longicornis seems to be equally abundant 

 inside the bay and in the open sea, on the surface and in 

 the deeper waters. Sometimes the large numbers are in 

 the surface nets and at other times in the weighted net 

 from below. This is one of the species that congregates 

 in swarms, and so is occasionally caught in unusually 

 large numbers. Of four similar hauls taken across Port 

 Erin Bay on April 13th, the first two gave 875 and G20 

 and the last two 1,550 and 3,700 specimens of Temora, 

 On the same date three hauls (two surface and one deeper) 

 .taken outside (Station III) gave 800, 850 and 900 

 specimens, which indicates an even distribution, but half 

 an hour later a couple of miles away the same two surface 

 nets gave 2,400 and 4,750 specimens; and moreover in 

 this last case nearly all the Temora in the 2,400 were 

 young, while in the second net the 4,750 were all adults, 

 indicating a segregation of the stages in swarms. Many 

 other examples of both agreement and divergence between 

 the comparable nets could be given, and some may be 

 seen in the Forms we have printed in this Report. 



The records of some of the other species of Copepoda 

 * These numbers quoted are, of course, the highest records. 



