impressa, on the growth and health of oysters, Crassostrea 

 virginica, under field conditions," 553 



"Winter-time distribution and abundance of copepod nauplii in the 

 northern Gulf of Mexico," by M. J. Dagg, P. B. Ortner, and J. 

 Al-Yamani, 319 



WITHLER, RUTH E.-see BEACHAM et al. 



WOLf^ PETER H.-see FARLEY et al. 



YANG, M. S., and P. A. LIVINGSTON, "Food habits and daily 

 ration of Greenland halibut, Reinhardtius hijypoglossoides, in the 



eastern Bering Sea," 675 



YANG, MEI-SUN, "Morphological differences between two con- 

 generic species of pleuronectid flatfishes: Arrowtooth flounder, 

 Atheresthes stomias, and Kamchatka flounder, A. evermanni," 

 608 



Yukon River salmon, 663 



ZIESKE, GLEN G.-see DITTY et al. 



ZIMMERMAN, ROGER J.-see STONER and ZIMMERMAN 



Zooplankton— see Plankton studies 



859 



