1922] Allen: Studies on Diatoms and Dinoflagellates 373 



the essential points. Note that the numbers of dinoflagellate cells are 

 on the average smaller (usually much smaller) than the numbers of 

 diatom cells throughout the year at both stations. 



Daily Average Numbers of Cells per Liter in Seven Day Periods 

 through 1920 



Diatoms DixoFLAfiELLATES 



La Jolla Pt. Hueneme La JoIIa Pt. Huene 

 231 601 



2,510 570 



3,412 554 



1,000 430 



67,853 45,700 1,913 800 



200,301 8,712 4,900 307 



105,852 4,619 6,S9.s 389 



161,255 1,259 1,669 448 



81,570 3,557 3,345 309 



99,648 3,815 4,192 266 



110,014 18,451 12,942 344 



94,858 33,543 8,347 245 



10,183 6,357 965 789 



13,162 11,584 1,056 S64 



1,346 5,070 987 1,760 



3,837 20,755 1,138 464 



2,436 161,299 2,168 2,416 



364,723 130,851 13,045 4,528 



65,408 52,756 10,997 4,176 



4,8?3 31,672 4,217 8,600 



185,253 45,269 5,582 7,178 



67,522 123,120 4,202 9,296 



407 6,032 15,157 6,035 



183 122,100 3,911 8,475 



320 58,716 15,490 3,221 



232,867 86,091 4,185 2,752 



341,851 104,328 1,774 3,781 



85,416 128,819 1,641 10,503 



1,751 142,445 2,290 14,840 



6,893 41,630 1,774 7,746 



1,742 23,136 2,602 24,195 



617 4,107 3,750 35,691 



878 17,507 2,560 8,861 



2,286 24,667 2,121 16,589 



6,991 8,088 5,557 6,303 



55,832 8,913 1,497 3,611 



102,219 11,619 1,271 816 



43,173 15,179 958 691 



8,436 20,987 1,099 1,357 



1,739 2,446 1,367 904 



2,811 3,019 843 1,021 



3,226 20,369 1,271 2,736 



3,393 3S.837 1,374 2,195 



1,989 5,984 1,179 1,029 



2,183 133 1,870 110 



706 47 1,613 61 



921 41 1,147 171 



6,020 1,365 2,343 265 



42,427 3,816 1,057 75 



17,982 1,175 1,337 67 



3,973 401 1,125 22 



4,039 907 2,165 40 



