MARINE BIOLOGICAL STATION AT PORT ERIN, 



41 



upon the causes of the seasonal changes in the plankton 

 of the Irish Sea, for several years back, during the 

 summer vacation, I have taken plankton hauls, both 

 vertical and liorizontal, from the yacht at many 

 localities amongst the islands and lochs of the West of 

 Scotland, as far north as Portree in Skye, and as far out 

 to the west as the island of Barra. I was able to show 



Fig. 17. Zooplankton. 







■'fl^/.H 





4 ^ 







Fig. 18. Phytoplankton. 



in the last report, from these Scottish gatherings, that 

 the state of aifairs at that time of year is somewhat 

 different from that in the Irish Sea. At some spots in 

 Hebridean Seas, for example, very large Phyto-plankton 

 hauls may be taken year after year in July — at a time 

 when in Manx waters the hauls are for the most part 

 comparatively small, and are all composed of Zoo- 

 plankton (figs. 17 and 18). 



