of the Fishery Board for Scotland. 



91 



c.c.'s, while that from 60 fathoms measured 25 c.c.'s, and the last from 70 

 fathoms, 170 c.c.'s. These gatherings showed that pelagic Crustacea, 

 though apparently scarce from 15 down to 45 fathoms, were fairly abun- 

 dant near the bottom. The contents of the different hauls consisted for the 

 most part of Calanus, and were otherwise similar to those collected in 

 September. 



1906. 



The gatherings collected in 1906 numbered 25. Five were collected in 

 April and June, and the same number in August, September, and October. 

 They were all vertical hauls, from 15, 30, 45, and 60 fathoms, and one 

 from the bottom. 



April. — The gatherings collected in Apiil seemed to indicate that 

 pelagic Crustacea, though not very plentiful, were distributed more or less 

 uniformly throughout the water. The hauls measured respectively 5, 5, 

 7, 11*5, and 8 c.c.'s, showing an average of about 7'3 c.c.'s for each. The 

 contents of the different hauls consisted as usual for the most part of 

 Calanus, but a few other species were also observed, comprising Pseudo- 

 calanus, Euchceta and Acartia clausi, three or four Nyctiiphanes, and a 

 small number of Sagitta. 



June. — The distribution of the pelagic Crustacea as shown by the June 

 gatherings still continued fairly uniform, but there was apparently a 

 considerable increase, especially in the number of Calamus, the average for 

 the five hauls being about four times the average for April. The gather- 

 ings collected in June measured respectively 25, 22 - 5, 24, 35, and 40 c.c.'s. 

 There was a slight increase in the number of Euchceta present in the 

 bottom gathering, but otherwise the contents of the various hauls were 

 similar to those collected in April. 



August. — The gatherings collected in August showed that a consider- 

 able falling off in the number of pelagic Crustacea had taken place since 

 the June gatherings were collected, and that their distribution was much less 

 uniform. The hauls from 15 and 30 fathoms were similar in quantity, and 

 measured only 3 5 c.c.'s each, those from 45 and 60 fathoms measured 

 respectively 19 and 17*5 c.c.'s, while that from the bottom measured 

 70 c.c.'s. The contents of these gatherings did not differ much from those 

 collected in June, except that Calanus appeared to be more immature. 



September. — The September gatherings somewhat resembled those of 

 the previous month, but Euchceta appeared to be rather more frequent, 

 and in some of the hauls formed about 1 per cent, of the catch. The 

 hauls from 15 and 30 fathoms measured respectively 2*5 and 5 c.c.'s, and 

 that from 45 fathoms 21 c.c.'s. The next two gatherings — the one from 

 60 fathoms and the other from the bottom — differed considerably. The 

 one measured only 15 while the other measured 60 c.c.'s. A few Rhoda 

 raschi and Nyctiphanes occurred in the gatherings from deep water, and a 

 small number of Sagitta were also observed, but Calanus was the pre- 

 dominating species in all the gatherings. 



October. — The hauls collected in October from 15, 30, and 45 fathoms 

 were small, and measured 3, 25, and 6 c.c.'s respectively, but those from 

 60 and 70 fathoms measured, the one 55 and the other 115 c.c.'s. The 

 contents of the various hauls were similar to those collected during the 

 previous month. 



1907. 



The gatherings collected in 1907 numbered twenty -four. They were 

 all vertical hauls. Five of them were collected in April and May, four in 

 September, and five in October and December, as described below : — 



April. — The distribution of the pelagic Crustacea, and especially of 

 Calanus, was shown by the gatherings collected in April to be more or 



