Index 



263 



Sphaerium vermontanum, 94, 95, 

 97, 99, loi, 103, 107, 109, 133, 

 143, 146, 154, 159, 163, 164, 214. 



Sphseriidse, 205. 



Spirodela polyrhiza, 60, 80. 



,Spriog>Ta, 81-84, 94, 95, loi, 105, 

 109, III, 172-176, 179, 183, 191. 



Spirogyra fluviatilis, 84, 92. 



.Spirog>Ta pratensis, 84, 103. 



Sponges, 146, 186. 



Spongilla, 92, 94, 97, loi, 201. 



Spongilla Iragilis, 109, 184, 186, 

 239, 240. 



Spongilla heterosclerifera, 184, 

 187, 239-243. 



Spongilla lacustris, 103, 184, 186, 

 187, 239. 



Statoblasts, 188. 



Steamboat wharf, 70,. 71. 



Sterki, 25, 163, 164, 166. 



Stigeoclonium falklandianum, 85, 



Stigeoclonium hormoides, 84, loi. 

 Stizostedion vitreum, 217. 

 Stringer, 25, 188. 

 Stylaris, 92, 94, 97, loi, 103, 107, 



109, 138, 143, 146, 184, 189. 

 Symphynota complanata, 140. 

 Symphynota costata, 140. 

 Strophitus, 161. 

 Strophitus edentulus, 156, 161. 

 Strophitus undulatus, 161. 

 Succinea avara, 181. 

 Succinea retusa, 181. 

 Sucker, common, 214, 216, 220, 



221. 



Tabanid^e, 103, 1S4, 19S. 



Tahoe trout, 216. 



Tanypinse, 97, 109, 184, 199. 



Tanypus, 205. 



Tanytarsus, 92, 94, loi, 103, 107, 



109, 133, 138, 184, 198. 

 Tanytarsus flavicollis, 132. 

 Tetragoneiiria cynosura, 109, 184, 



195- 

 Thierre's Landing, 35, 37, 44, 68, 



69, 70, 169. 

 Tioulid larva, 103. 

 Tipulidae, 184, 198. 

 Titcomb, 45. 

 Tolypothrix, 83, 109. 



Tolypothrix limbata, 84, 92, 97, 



loi, 103. 

 Tolypothrix tenuis, 84, 97, loi. 

 Transeau, 25, 83, 237. 

 Trichoptera, 92, 94, 97, loi, 103, 



107, 109, 129, 131, 132, 138, 149, 



205. 

 Trichopterid larvae, 120. 

 Tubificidse, 92, 94, 97, loi, 103, 107, 



109, 133, 184, 189. 

 Tubellaria, 92, 101, 103, 107, 109, 



138. 

 Turbellarian worms, 81. 

 Tuttle Brook, 75, 76, 173, i8i. 

 Twin Lakes, Minn., 157. 

 Typha, 174, 177, 180. 

 Typha angustifolia, 61, 63, 65-67, 



70, 71, 79, 125. 



Ulothrix, 81, 83, 151. 

 L^lothrix subtilissima, 84, 133. 

 Ulothrix zonata, 84, 133, 138. 

 Unionicola, 109, 184, 201. 

 Unionidas, 159, 205, 218, 219. 

 United States National ^Museum, 



25- 



Utricularia, 49, 81. 

 Lhricularia vulgaris, 71. 

 Utricularia vulgaris americana, 80. 



Vallisneria, 49, 51, 53, 159. 

 Vallisneria spiralis, 58, 60, 66-72, 



74, 75, 79. 119,. 129. 

 Valuation investigations, 203. 

 ^'aluation of the bottom, 87. 

 Valvata, 109, 124, 148, 155. 

 Valvata bicarinata normalis, 94, 



97, loi, 172, 214. 

 Valvata sincera, 107, 109, 147, 153- 



155, 159, 172, 182. 

 Valvata tricarinata, 76, 92, 94, 97, 



loi, 103, 107, 109, 133, 137, 138, 



147, 154, 155, 159, 170, 214. 

 Valvatidae, 205. 

 Vatter, Lake, 18, 53, 252. 

 Vaucheria, 81. 

 Vegetation, emergent, 47, 53, 121, 



131- 



Vegetation, stibmerged, 47, 51, 53, 



127, 131. 

 Vivipara, 148, 205. 

 Vivipara contectoides, 109, 167. 



