SEA-FISHERIES LABORATORY. 233 



most of which are of an oceanic type (snch as, Chaetoceras 

 densum and Rhizosolenia alata). The Pteropod Lima- 

 cina is present in nearly all cases in abundance (up to 

 about 30,000 in a haul). 



Sound of Sleat. 



Five hauls in Loch Hourn and Loch Nevis showed 

 very much the same characteristics as in previous years. 



North of Narrows of Skye — Inner Sound and Lochs. 



Nine hauls were taken between the northern part of 

 Skye and the mainland, and fall into two series, those in 

 the lochs being phytoplanktonic and mainly neritic, 

 while those in the opener water of the inner sound were 

 mainly a zooplankton. So far as they are comparable 

 these give much the same evidence as in previous years. 



This brings us to the furthest point north reached in 

 previous years, but we add the characteristics of the 

 remaining localities for comparison with those further 

 south. 



North-West Coast from Ru Rea to Gape Wrath. 



Seven hauls taken on August 15th and 16th show 

 mixed gatherings, with the exception of a haul in Loch 

 Inchard which is a typical phytoplankton containing 

 nearly 50 millions of Diatoms (the details of this haul are 

 given below). Some are more zooplanktonic than others, 

 but in general there are far more Diatoms here than in the 

 Hebridean seas south of Skye. 



From Cape Wrath to the Shetland Isles. 



Four hauls, two phytoplanktonic and two mixed 

 gatherings containing both animals and plants, of both 

 neritic and oceanic species, show at least that the Diatoms 

 had not disappeared by the middle of August at this 

 furthest north point in the British Seas. 



