SEA-FISHERIES LABORATORY. 97 
The monthly average curve for the total Dinoflagellata is 
not so regular, and reaches its maximum of nearly 225,000 
in July, the largest individual haul being 543,000 on July Ist. 
These are relatively high numbers for the Dinoflagellata, and 
are chiefly made up of Ceratiwm tripos which is at least four 
times as abundant as the species of Peridiniwm taken together. 
‘The monthly average curve for Peridiniwm rises gradually 
from units in January through tens, hundreds, thousands and 
tens of thousands to 50,000 in June, and then declines to a 
minimum of 100 in September, with a slight secondary rise in 
JAN. FEB. MAR. APR. MAY. JUNE. JULY. AUC. SEPT OCT NOV. _ DEC. 
5 1219 26 2 9 16232 9 162350 € 135 20274 111825 1 815 2229 6 1520273 10172431 7 142128 5 121926 2 9 1623307 42128 
: = fet 0 Pa Ped mia 
65 {| ] 
- 20S SS oS a ee eee 
= 9) 5) S000 200 DE SS Ge 
[oS SLD SST ee ce 
0 05 [SSS 20a ee 
- (SS So. [C0 Se ee eee ee 
= Oo SoD 060 SS Oe eee ee ec 
pe PEE 
- 240 (Soo S 0 ee eo ee 
() 52 55500000 ee ee 
o> RH HAH EH HH 
5) ao ce ee ee 
Se SS ee 
2952 COO ee ee 
0 So Se ee ee ee 
650 
949 eee ee 
— 2 00 SU ee ee 
OS SERS ee ee 
2 0 SE ee Cee 
345 eee ee Re 
2 4 SEAN NO hee COC 
43 Al Ne Nee 
2 oe SS ne ee 
2 SO SL aE Cd ee 
pemeeremenioe film tlti ttt ttt ttt eee 
39 [st TI Oc 
338 [YO bef abet? bake bales JI gaara 
37 NO Pte ete epee ren tol elit odie 
36 [1 
35 
34 1 I 
35 {I 
| 
October, falling to the end of the year in a most regular manner. 
Ceratium, with a monthly maximum of 180,000 in July, is not 
so regular, but shows the same form of curve. 
The highest monthly average for the Copepoda (both in 
the adult form and as Nauplii) was in August (when the 
Diatoms were at a minimum), although the September averages 
were nearly as high, and the greatest individual Copepod haul 
was 191,288 on September 6th. 
