tively scarce despite the periodic importance of 

 green algae in the coastal flora (C. Lorenzen un- 

 publ. data). 



In September 1980, the cyst (phycoma) stage of 

 Halosphaera sp. (Prasinophyceae) was observed 

 in Santa Monica Bay, Calif., providing an oppor- 

 tunity to study its importance in the feeding of 

 two calanoid copepods, Acartia tonsa and Calan- 

 us pacificus. Since chlorophyll b is present only 

 in the green algae (Chlorophyceae, Prasinophy- 

 ceae, Euglenophyceae) and chlorophyll c is pres- 

 ent in the diatoms, dinoflagellates, chrysomo- 

 nads, Haptophyceae, and Cryptophyceae (Meeks 

 1974; Parsons et al. 1977), we sought to compare 

 water column concentrations of chlorophyll pig- 

 ments with those in the guts of animals collected 

 in various parts of the bay. 



Methods 



Samples were collected at two of three stations 



in Santa Monica Bay (Fig. 1) on 12 and 26 Sep- 

 tember 1980. On 12 September, stations 7B and 

 N6 were sampled. On 26 September, stations 7B 

 and N4 were occupied. All samples were taken 

 between 0700 and 1200 h. 



Depth integrated water samples were collected 

 by lowering a submersible pump through the 

 water column (to the same depth as zooplankton 

 were collected; see below) at a constant rate and 

 by pumping into a 122 1 plastic container. The 

 contents were mixed thoroughly, and 1 1 samples 

 were withdrawn and fixed in 3% buffered For- 

 malin 1 for phytoplankton counting and identifi- 

 cation, using the method of Palmer and Maloney 

 (1954). Five hundred ml water samples were 

 frozen for pigment analysis. In the laboratory, 

 these were passed through 0.45 ^m filters (Nu- 

 cleopore) at low vacuum (<100 mm Hg), and pro- 



1 Reference to trade names does not imply endorsement by 

 the National Marine Fisheries Service, NOAA. 



Figure 1.— Station locations. 



155 



