vi LIST OF FIGUBES 



Figure Page 



31. Organic matter, crude protein, and ether extract in nannoplankton of 



Lake Mendota, 1916-17 77 



32. Numerical results for nannoplankton of Lake Mendota, 1915 90 



33. Numerical results for nannoplankton of Lake Mendota, 1916-17 90 



3-1. Organic matter in net plankton, nannoplankton, and total plankton of 



Lake Mendota, 1915 94 



35. Organic matter in net plankton, nannoplankton, and total plankton of 



Lake Mendota, 1916-17 95 



36. Monthly distribution af total plankton in deep part of Lake Mendota, 



1915-17 99 



37. Organic matter in net plankton of Lake Monona, 1913 and 1916, and in 



nannoplankton in 1916 106 



38. Organic matter and crude protein in nannoplankton of Lake Monona, 



1916 116 



39. Organic matter in net plankton, nannoplankton, and total plankton of 



Lake Waubesa in 1916 125 



40. Organic matter and crude protein in nannoplankton of Lake Waubesa 



in 1916 133 



