SEA-FISHERIES LABORATORY. 283 



but so far as they go they tend to establish the conclusion 

 stated above as to the distribution of at least some 

 elements of the plankton in zones of depth. 



HORIZONTAL DISTRIBUTION. 



It is clear from an inspection of the Forms recording 

 the 650 hauls now before us, that a much more detailed 

 analysis than we can possibly give them before the 

 publication of this Annual Report, will be necessary in 

 order to arrive at any definite conclusions as to the relations 

 between the results obtained horizontally at the different 

 localities and dates. We recognise that we are far from 

 having exhausted the information to be derived from 

 these records ; and the horizontal distribution, along with 

 many other details of interest which we have noticed in 

 the course of our work, must remain for some future 

 occasion. 



A mere inspection of the Forms shows in some cases 

 close resemblances between adjacent stations (such as I 

 and II) on the same clay, or between adjacent days at the 

 same station, and in other cases just as striking 

 differences. How far these points of similarity and of 

 divergence are normal and ar^ fundamental, or how far 

 they are due to wind, sun, and other weather conditions, 

 or to tidal and other currents, will require detailed 

 consideration. 



We have several times been struck by the largeness 

 of the hauls obtained, under very difficult conditions, in 

 the strong tidal currents that race round the Calf Island. 

 Such hauls are especially rich in Oopepoda and other 

 larger organisms of the plankton, and this observation is 

 co-related with the well-known richness of the bottom 

 and the littoral faunas in that same region, and agrees 



