262 



Index 



Potamogeton richardsoni, 49, 51, 



54, 60, 65-72, 79, 119, 176. 

 Potamogeton robbinsii, 49, 51, 65- 



67, 71, 78, 79, 119- 

 Potamogeton zosterifolius, 51, 65- 



72, 79, 1 1-9. 

 Pratt, 187. 



Prionodesmacea, 159. 

 Pristina, 94, 97, loi, 103, 184, 189. 

 Procladius, 109, 184, 198. 

 Producers, 206, 223. 

 Protozoa, 81, 185. 

 Psephenus lecontei, 90, 92, 97, 138, 



153, 184, 199, 200. 

 Psendosuccinea, 148, 205. 

 Pseudosuccinea columella, 178. 

 Pseudosuccinca columella chalv- 



bea, 123, 153, 178. 

 Ptychobranchus phaseolus, 140. 

 Pumpkinseed, 212, 214, 215, 217, 



220, 221. 



QUADRULA CYLINDRICA, I4O. 



Quadrula rubiginosa, 140. 

 Quadrula undulata, 140. 

 Quantitative studies, 86, 87. 



Radicula aquatica, 80. 

 Reighard. 31, 53, 216. 

 Rhizoclonium, loi, 107. 

 Rhizoclonium hieroglyphicum, 85, 



97, loi. 

 Rhizopoda, 185. 

 Richardson, 193. 

 Riddle, 210, 217. 

 Rissoa, 141. 

 Rivularia, 83, 84, 94. 

 Rivtilaria paradoxa, 84, 97, loi, 



.107. 

 Rivularia pisum, 84, 94, 97, 107. 

 Robertson, 155. 

 Robinson, 78. 

 Rochefort, France, 149. 

 Rotifera, 81. 



Sagittaria, 53. 



Sagittaria arifolia, 59, 60, 63, 65, 



66, 79, 168, 169, 175-177. 

 Sagittaria latifolia, 59, 60, 63, 67, 



78, 79- 

 Salix nigra falcata, 59, 63, 80. 

 Salmo henslowi, 216. 



Sargent, 178, 179. 

 Schleswig-Holstein, 148. 

 Scirpus, 70, 7_i, 174, 179. 

 Scirpus americanus, 58, 60, 61, 63, 



65, 67-71, 74, 79, 119, 188. 

 Scirpus occidentalis, 53, 58, 60-71, 



77-79, 119, 186-188. 

 Scirpus smithii, 58, 60, 62, 67, 79, 



119, 186, 193. 

 Scytonema, 83, loi. 

 Scytonema crispum, 84, 138. 

 Sedge, ,79. 

 Segmentina, 148. 

 Segmentina armigera, 78, 107, 150, 



153, .177. 

 Semotilus bullaris, 220. 

 Sharpe, 25, 191. 

 Shaw Point, 41. 

 Shell River, Minn., 157. 

 Shepard Point, 169, 170. 

 Short Point, ^t,, 36-38, 40, 42, 49, 



59, 60, 61, 64, 244, 245. 

 Short Point Bay, 29, 34, 35, 39, 41, 



49, 51, 53, 59, 177- 

 Sialis, 185. 



Sialis infumata, loi, 109, 184, 195. 

 Sida crystallina, 94, 97, loi, 103, 



109, 138, 184, 190, 191. 

 Simocephalus serrulatus, 76, 94, 



97, loi, 103, 107, 109, 133, 184, 



190, 191. 

 Simocephalus vetulus, 76, loi, 107, 



184, 190. 

 Simonton, 155. 

 Smith, F., 25, 186, 239. 

 Smith, H. M., 26. 

 Somatogyrus, 148, 154, 158. 

 SomatogvTus subglobosus, 109, 



133, 168. 

 South Bay, 27. 

 Sparganium, 174. 

 Sparganium eurycarpum, 59, 63, 



65^7, 79, 125.' 

 Species, attendant, 91. 

 Species, casual, 91. 

 Species, principal, 91. 

 Spha;rium, 21, 102, 141, 148, 155. 

 Sphaerium solidulum, 109, 153, 154, 



159, 163, 164. 

 Sphaerium striatinum, 163. 

 Sph^rium sulcatum, 109, 153, 154, 



163, 164. 



