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Part III. — Twenty -seventh Annual Report 



1907. 



April. — The five hauls collected in April 1907 were all of them small ; 



the two largest measured only about 2 c.c.'s each. The scarcity of pelagic 

 Crustacea at this time appeared to be general all through the water, as 

 shown by the smallness of the catches. These gatherings consisted for the 

 most part of Calanus; a small number of Pseudocalanus, Centropages 

 hamatus, and Cirriped larvae, one or two Nyctiphanes, Sagitta, and lish ova 

 were also present. 



May. — The number of hauls collected in May was similar to the last. 

 They showed that a considerable increase in the number of pelagic 

 Crustacea had taken place since the April gatherings were collected. All 

 the catches were of moderate size, especially those taken at 45 and 60 

 fathoms, which measured respectively 12 and 17 c.c.'s. The other three 

 gatherings from 15, 30, and 75 fathoms were smaller, and measured 8, 7, 

 and 9 c.c.'s respectively. The contents of the several gatherings consisted 

 chiefly of Calanus, other forms being very scarce. 



June. — Moderately large gatherings were obtained in all the five 

 hauls collected in June, but at this time pelagic Crustacea were apparently 

 more plentiful at 15 fathoms than they were lower down, as shown by the 

 results of the different hauls, the measurements of which are as follow : 

 — The gathering from 15 fathoms measured 80 c.c.'s, while the others from 

 30, 45, and 60 fathoms and the bottom measured respectively 55, 15, 22, 

 and 25 c.c.'s. 



September. — The four vertical hauls collected at this station in Sep- 

 tember exhibited a decided falling off in the numbers of pelagic Crustacea 

 when compared with those collected in June. The hauls from 15, 30, and 

 45 fathoms were small, and measured respectively only 1, 1*5, and 4*5 c.c.'s, 

 while that from 65 fathoms measured 21 c.c.'s ; this gathering consisted 

 almost entirely of Calanus, but in those from 15 and 30 fathoms a few 

 other species were also sparingly observed, including Pseudocalanus, Cen- 

 tropages hamatus, Temora longicornis, and Acartia clausi. 



October. — Five vertical hauls were collected in October. Those from 

 15, 30, and 45 fathoms were very small, so also was the gathering from 

 60 fathoms. The gathering from 75 fathoms was considerably larger 

 than the others and measured 40 c.c.'s, and though Calanus formed the 

 largest part of it, a small number of Pseudocalanus, Acartia, Nyctiphanes, 

 and Rhoda raschi were also observed. The other gatherings consisted 

 almost entirely of Calanus, but among them were a few Sagitta. 



December. — The gatherings collected in December were, with the 

 exception of the haul from 15 fathoms, considerably larger than those 

 collected in October. The gathering from 15 fathoms measured 4 c.c.'s, but 

 those from 30, 45, and 55 fathoms measured respectively 25, 82, and 115 

 c.c.'s. These gatherings consisted almost entirely of Calanus, except that 

 a few Euchaita and one or two Nyctiphanes were present in the haul from 

 55 fathoms. 



1908. 



March. — Vertical hauls from 30, 45 and 60 fathoms collected in March 

 1908 measured 2, 1, and 1*5 c.c.'s respectively. Calanus was the only 

 species observed in the first two, but in the other a few Nyctiphanes were 

 also noticed, as well as one or two Sagitta. 



May. — The four gatherings collected in May gave fairly good results, 

 and indicated the presence of a considerable abundance of pelagic 

 Crustacea. The hauls were from 15, 30, 45, and 60 fathoms, and measured 

 respectively 10, 9, 31, and 17 c.c.'s. Calanus appeared to be the only 

 species represented in these gatherings, with the exception of a few 

 Centropages hamatus and Sagitta. 



