82 



Part TIL — Twenty-seventh Annual Report 



Calanus, on the other hand, formed only about 25 per cent. ; there were 

 also a few Temora longicornis and some larval forms. 



August. — Vertical hauls from 10, 15, and 25 fathoms were collected in 

 August; all the three gatherings Mere small. About half of the total 

 catch consisted of Calanus and the remainder of Pseudocalanus, Centro- 

 pages hamatus, and Acartia clansi, but a few Evadne, Podon leuckarti, and 

 Parapontella brevicomis were also observed, along with a few larval forms. 



September. — Two vertical hauls, one from 15 and the other from 25 

 fathoms, were collected in September. The total catch measured only 

 about 1*5 c.c.'s. The gatherings were about equal, and consisted almost 

 entirely of Calanus, a few Pseudocalanus and Acartia claim being the 

 only other organisms observed. 



October. — Two gatherings collected in October w r ere also very small. 

 They were vertical hauls, one from 15 fathoms and the other from the 

 bottom, and consisted almost entirely of Calanus. 



1906. 



April. — Vertical hauls from 15 and 26 fathoms were collected in April 

 1906. They were both small, and together measured only about 4 c.c's. 

 The contents of the first consisted chiefly of Calanus, with a few Pseudo- 

 calanus, Centropages hamatus, and a small number of fish ova. In the 

 second gathering, Pseudocalanus was rather more frequent and formed 

 about a third of the catch. 



June. — Two gatherings collected in June 1906, comprising a vertical 

 haul from 15 fathoms, and one from the bottom (about 25 fathoms), 

 measured 3-5 and 4-5 c.c.'s respectively, and consisted almost entirely of 

 Calanus. 



August. — Two vertical hauls similar to the last were collected in 

 August; one measured 3 and the other 2*5 c.c.'s. In the first Calanus 

 formed fully 50 per cent, of the catch, Pseudocalanus 25 per cent., and 

 Centropages about 20 per cent. A few specimens of Parapontella brevi- 

 comis and Thaumaleus rigidus were observed in this haul. In the bottom 

 gathering Calanus, Pseudocalanus, and Centropages were about equally 

 numerous. Acartia clausi was also observed, but only in small numbers. 



September. — The two vertical hauls collected in September were very 

 small, and together measured only about 2 c.c.'s. They consisted for the 

 most part of Calanus and Pseudocalanus in nearly equal numbers. A 

 few Centropages hamatus were also present in the bottom gathering. 



October. — Vertical hauls from 15 and 25 fathoms were also collected 

 in October ; they were both small gatherings. In the first Calanus and 

 Acartia clausi were about equally numerous, but a few specimens of 

 Anomalocera and Decapod larva? were also noticed. The second consisted 

 for the most part of Calanus, Pseudocalanus, and Acartia clausi, together 

 with a few Centropages hamatus. There were also a small number of 

 Sagitta and Decapod larvae present in this gathering. 



1907. 



April. — Two vertical hauls, one from 15 and the other from 29 fathoms, 

 were collected in April 1907. Both gatherings were very small, and 

 consisted chiefly of Calanus, mixed up with which were a few other 

 common forms. 



May. — The two vertical hauls collected in May, the one from 15 and 

 the other from 27 fathoms, showed a marked difference from the previous 

 gatherings in the larger amount of pelagic Crustacea captured. But the 

 two samples, which measured respectively 11 and 13 c.c.'s, consisted almost 

 entirely of Calanus, no other species being noticed. 



