SEA-FISHERIEFS LABORATORY. 289 
being in May to July in place of April, and the autumn 
increase in October being about a month later than in 
1907. The various elevations are also seen to be much 
higher in 1908. 
Bay Coprrropa 1n 1908. 
The Copepoda in 1908 show at least three distinct 
maxima, at the end of March, the middle of June, and 
in September and October. An unusually large haul for a 
winter gathering (1,170—mainly composed of Pseudoca- 
lanus elongatus, Acartia clausi, and Orthona similis) was 
obtained on January 7th, and from this there was a 
eradual but fluctuating decrease to 152 on March IL1th, 
then a sudden rise to 3,830 on March 17th, after which 
the numbers keep up till April 2nd, followed by a sudden 
fall to 420 on April 7th. The value fluctuates from 0 
to 000 till April 18th, when it rises to 1,280. TFurther 
rapid fluctuations lead to an elevation of 2,520 on April 
25th. There is then a fall to 18 on May 12th. From this 
point the value rises quickly, though gradually, to 3,792 
to 
on June 4th, drops to 325 on June Oth, rises again 
4,314 on June 10th, drops to 150 on June 25th, after 
which the value keeps fairly low (with the exception of 
a rise to 2,055 on August 7th) until the end of August. 
On June 30th an exceptional 15 minutes’ haul was 
taken with a coarse net (No. 6 silk) which gave 22 c.c. 
of total catch, including 8,650 Copepoda, as against 150 
Copepoda on June 25th and 332 on July 2nd with the 
ordinary fine nets. 
Beginning with September, both coarse aa fine nets 
were used in the bay as well as outside, as follows 
Coarse Nets.—On September 14th the number 
is 64,470 — this drops steadily by three steps to 
2,870 on September 21st, rises again to 11,740 
on September 28th, and drops to 4,609 on Sep- 
tember 30th. It fluctuates in the first week in 
