86 THE AMERICAN ARBACIA 



Pigment vacuoles 5.5% 

 Fluid 61.1% 



Data on the various granules will be found in Part IV. 



General References 



Wilson, 1925. The Cell; older literature. 



Runnstrom, 1952. Modern Trends in Physiology and Biochemistry ; recent literature on cytoplasm. 



Mazia, 1952. Modern Trends in Physiology and Biochemistry ; recent literature on the nucleus. 



