MAEINE BIOLOGICAL STATION AT PORT ERIN. 



43 



of previous summers ; but this much may be said that the 

 impression produced at the time of collecting (fig. 19) 

 was that during July and August the Diatoms were less 

 in evidence, that the Phyto-plankton was less in amount 



Fig. 19. Taking Plankton and Salinity observations on the " Runa." 



and less widely extended, and that a larger proportion 

 of the present collection is Zoo-planktonic. 



In addition to the investigation of the plankton a 

 certain amount of dredging with the " Agassiz " trawl 

 (see fig. 20) took place during the vScottish cruise. The 

 apparatus worked well, and some interesting hauls were 

 obtained. Figure 21 gives the appearance of a mixed 



