SEA-FISHERIES LABORATORY. 287 
Bay DinornaAGeLLata in 1908. 
During the first quarter of 1908, the Dinoflagellates 
kept between 150 and 750 per haul, with one rise to 1,000 
on February 17th. On April 13th there was a sudden 
rise to 5,100, followed by rapid fluctuations between 0 
and 2,500 until May 20th, when there was another sudden 
rise to 80,000. The numbers then dropped by two steps 
to 7,250 on May 28th, rose by three steps to 135,000 on 
June 4th, dropped to 15,250 on June 18th, rose again to 
157,500, the highest point reached, on July 2nd, dropped 
suddenly to 18,000 on July 7th, and 1,125 on July 14th. 
Then there is an upward trend to a maximum of 52,250 
on August 5th, after which the curve shows a general 
downward trend to 125 and 170 on August 29th. During 
September the numbers are still small. In ten hauls with 
coarse nets, only twice were any Dinoflagellata caught—~- 
on September 14th and 21st, with 100 and 4,000 respec- 
tively. With the fine nets the numbers varied from 0 to 
nearly 2,000, until September 30th, when we got 5,650. 
From October Ist to 13th catches from the coarse nets rose 
irregularly from 0 to 1,000, and fluctuated durimg the 
rest of the month from 0 to 500; and from the fine 
nets they started on October Ist at 1,600, rose on the 2nd 
to 1,900, then dropped through 850 and 800 to O on 
the 6th, rose again to 5,400 on the 15th, and kept ranging 
from 0 to 3,100 during the rest of the month. On 
November 2nd, 6th and 10th, three hauls with coarse nets 
caught none, but the number rose on the 15th to 75, and 
on the 30th to 240; while with the fine nets the numbers 
range from 60 to 1,100 on the 13th. In December the 
numbers continued to keep low, the highest being 510 on 
December 4th in the fine net, and dropping to 240 on the 
23rd, while the numbers with the coarse nets ranged 
from none to 100, 
