WILSON, D. P. 
1935. Life of the shore and shallow sea. London. 
1949. The decline of Zostera marina lL. at Salcombe and its 
effects on the shore. Jour. Mar. Biol. Assoc. UeK., 
WINKLER, L. R., and E. Y. DAWSON 
1963. Observations and experiments on the food habits of 
California sea hares of the genus Aplysia. Pacific Science, 
17(1): 102-105. ~ 
WOHLENBERG, E. 
1935. Beobachtungen uber das Seegras, Zostera marina Le und 
seine Erkrankung im Nordfriesischen Wattenmeer. Beitr. 
zur Heimatforsch.e in Schleswig-Holstein, Hamburg, und 
Lubeck, 2. 
YOCOM, C. F. 
1951. Waterfowl and their food plants in Washington. Univ. 
of Washington Press, Seattle. 
YOUNG, E. L. 
1937. Notes on the labyrinthulan parasite of the eelgrass 
Zostera marina. Bull. Mt. Desert Island Biol. Lab., 
Pe 33"3)- 

1938a. Recent investigations on the eelgrass problem. 
Bull. Mt. Desert Island Biol. Lab., 1938: 26-28. 
1938b. Labyrinthula on Pacific coast eelgrass. Canad. Jour. 
Res., lo: 1l5=l17- 
1943. Studies on Labyrinthula, the etiologic agent of the 
wasting disease of eelgrass. Amer. Jour. Bot., 30: 586-593. 
ZENKEVICH, L. A. 
1957. Caspian and Aral Seas. In Treatise on marine ecology 
and paleoecology. J. W. Hedgpeth, ed., Geol. Soc. Amer. 
Memoir, 67: 891-916. 
