262 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
“star ’’-figures of the wind for the same months. The 
great difference in the position of the spring maximum of 
plankton in these two years will be appreciated when it 
is stated that in 1907 the catch rose to 14°5 c.c. on March 
27th, to 31 c.c. on April 2nd, and to 42°6 c.c. on April 3rd ; 
while in 1908 it was only 2°5 on April 2nd, 23°5 on April 
18th, and did not reach any higher level. It will 
be noticed on the weather diagrams that there were 
distinctly more westerly and south-westerly winds in 
Jan. Kb. Man. Apr May June dely dug: Sept. Oct. Now, Dec. 
Fic. 7. Diagram showing average haul of Plankton per month in 1908. 
February, March and April. 1907, and more from the 
north and east in the same months of 1908. 
Beginning with March, probably the critical time in 
the history of the spring plankton, the following contrasts 
are noticed on the diagrams :— 
1907. 1908. 
Catch Catch 
ine.c. Prevalent Winds. | ine.c. Prevalent Winds. 
Mareh ... 7:5 S.W. 1-8 all directions. 
April... 21-5 W. and all directions} 6-7 N. and E. and 8.E. 
May 7-0 more Easterly. 11-3. more 8.W. 
June 16:0 more 8.W. 5.6 more §.E. 
July ... 5°5 more 8.H. and W. 1-25 more §.W. and N. 
August 10-0 more W. and 8.\W. 1-2 more W. and N. and F. 
Sept. 4-5 more 8.E. 3-8 more S. and 8.W. 
Oct. 6-5 more 8.W. and §. 3-0 more 8.E. 
Nov. 4-0 more 8.E. 1:8 more W. 
Dec. 1-2 more §.E. 1:3. more 8.F, 
