SEA-FISHERIES LABORATORY. 319 



This year we cannot make so generally the criticism 

 which we made in our last report, that the gatherings are 

 a month later than in 1907-1910. Thus our gatherings 

 from the north end of the Sound of Mull are about the 

 same date (latter half of July), as in the former years. 

 The gathering from Hyskeir was on July 11th in 1910; 

 this year it is July 24th, which might cause a distinct 

 difference. A haul at the mouth of Loch Scridain on 

 July 21st may be compared with that of August 12th, 1912, 

 between Staff a and Lunga, and shows an even more marked 

 zoo-plankton, and as regards this year's catches we have 

 already drawn attention to the fact that of two hauls taken 

 in the same locality on different dates, the later very 

 often shows a marked diminution in the zoo-plankton. 



The persistence of the change in type of the gatherings 

 off Ardmore and in that neighbourhood since 1910 is 

 remarkable. 



Perhaps the most noteworthy point about this year's 

 hauls is the presence of great numbers of Calanus 

 finmarchicus practically everywhere throughout the area 

 examined. Calanus was scarce only in two gatherings, 

 one off Lismore on August 26th, and one in Upper Loch 

 Hourn on August 20th, while as regards the latter locality, 

 Calanus was common in Outer Loch Hourn on the same 

 date. 



As in 1911, Limacina has been common in many 

 gatherings, and in much the same localities as in that year. 



There is no trace this year of either Doliolum or 

 Cupulita. Metridia occurs in a tew gatherings : off 

 Ardmore, July 14th, was its most southerly occurrence; it 

 also occurred North of Rum on August 12th; in Rona 

 Sound and off South Rona, August 15th and 16th, and at 

 the Shiants on July 31st and Loch Shell on August 4th. 

 Corethron criophilum, which is also an Atlantic form, was 

 common about Rona Sound on August 15th and 16th. 



