ROPER, "Intensity regulation of bioluminescence dur- 

 ing countershading in living midwater animals" 239 



YUEN, HEENY S. H.— see LAURS et al. 



Zalembius rosaceus — see Surfperch, pink 



Zoeae 



Puget Sound, Washington 

 crabs, short-term thermal resistance of 555 



Zooplankton 



California Current, annual fluctuations in biomass, 



1955-59 



data processing methods 358 



geographical distribution 359 



year-to-year fluctuations 361 



Oregon coast, central 

 seasonal cycle of abundance and species composi- 

 tion 717 



906 



