SEA-FISHEKJES LABORATORY. 357 



yhaetoceras boreale 27,300 



breve 1,603,000 



constrictum 355,700 



debile 60,000 



decipiens 410,400 



teres 86,600 



spp 4,286,400 



Corethron criophilum 2,300 



Coscinodiscus radiatus 1,150 



Eucampia zodiacus 1 1,500 



Guinardia tlaccida 5,700 



Lauderia borealis 627,000 



Nitzschia seriata 96,000 



Rhizosolenia semispina 148,500 



„ shrubsolei 131,100 



stolterfothii 20,000 



Thalassiosira gravida 22,800 



nordenskioldii 46,200 



It will be noticed that the Copepoda are mostly 

 oceanic (including Metridia lucens), whereas the 

 Diatoms, amounting in some cases to millions and in 

 others to hundreds of thousands, are almost wholly 

 neritic. 



The surface gathering was of the same type, in its 

 main character a neritic phyto-plankton, but having a 

 few Copepoda and other animals that are regarded as 

 oceanic. 



Another surface haul was taken on the same day in 

 Upper Loch Seaforth, above the island, some miles 

 further inland than the position of the two last hauls. 

 It is a well-marked phyto-plankton of neritic type, 

 containing large quantities of Diatoms (common species 

 of Lauderia, Chaetoceras and Rhizosolenia). This haul 

 is very much of the same nature as the surface haul in 

 the outer part of the loch, but is, if anything, as might 

 be expected, even more markedly neritic. 



The last of these Outer Hebridean samples was a 

 surface gathering taken on August 12th in the middle 

 of the East Shiant Bank when re-crossing the Minch 

 towards B/u Rea. It is again an oceanic zoo-plankton, 

 with no further features worthy of notice. 



