I06 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 28 



more within the group than with other groups. For instance, it is 

 stated that veligers were very abundant on September 9, 1949, and 

 that copepods were also very abundant on that day, but the number 

 of copepods taken were many times more numerous than the veligers. 

 However, in comparison with the number of veligers taken on other 

 days, on September 9, 1949, they were very abundant. 



The tows made in November 1949 were from ice cakes alongshore. 

 Conditions during the latter part of November and during December 

 prevented taking plankton samples. The tows from January 21 to 

 February 28, 1950, inclusive, were vertical ones made through the 

 ice at a distance of three-fourths mile from shore where the water was 

 '^'J feet deep. Subsequent tows were made through the ice at the 

 regular plankton station 1.6 miles from shore where the water was 

 80 feet deep. (See "Plankton Sampling, Winter.") 



In the following lists certain abbreviations are used : Cyanea refers 

 to C. capillata: Aglantha to A. digitale; Merfensia to M. ovum; 

 Beroe to B. cucumis; Clione to C. limacina; and Spiratella to S. heli- 

 cina. A = abundant ; A A = very abundant ; AAA = exceedingly abun- 

 dant; C = common; R = rare; lg. = large; sev. = several ; sm. = small; 

 and yg. = young. 



Table 7. — Gross analysis of plankton. Point Barrow, Alaska, August-September 

 1948, September 1949- July 1950 



DIATOMS 



8- 2-48 Few of several kinds 



8-30-48 Many kinds abundant; circular (Coscinodiscus) type, A 



9- 4-48 A 



9- 9-49 Several kinds, C 

 9-10-49 AAA 

 9-13-49 AAA 



9-30-49 R 



10-24-49 AAA 



10-31-49 Few, mostly circular type 



II- 1-49 Spiny type, A; spicule type, C; circular type, R-C 



11-10-49 Rare 



1-21-50 I fragment of spiny type 



1-25-50 Few of circular iridescent type 



1-27-50 " " 



2-io-so " " 



2-25-50 None 



2-28-50 I circular type 



3- 8-50 I of circular iridescent type 



3-14-50 None 



3-23-50 2 of circular iridescent type; i spiny type 



