INDEX 



Sphagnum moss, 56, 61, 65- 

 66, 96, 98, 121; pools, 49 



Sphcerium, 256, 322; striatum, 

 322; sulcatum, 321-322 



Sphagnacece (sphagnums), 65- 

 66 



Sphere-shells, 256, 322 



Spiders, 286 



"Spinners", 199 



Spirodela polyrhiza, 82-83 



Spirogyra, 49, 50, 52, 121, 

 122, 130, 170, 239, 266, 348 



Spirostomum, 56 



Sponges, Frontispiece, 32, 95, 

 104-111, 192, 246; associ- 

 ates, 109; distribution, 107- 

 108; fresh water, 15, 36; 

 habitat, 107-108; identifi- 

 cation, III; in reservoirs, 

 107; in waterpipes, 107; 

 parasites on, 109; preserv- 

 ing, 41; season, 108; study 

 and collecting, 109; winter 

 study, 109-111 



Spongtlla, 106; fragilis, 108; 

 lacustris, 108 



Spongilla-flies, 109, 240, 245- 

 246 



Spreading braid, 43-44 



Spring peepers, 352, 375-376, 

 386. 



Springs, collecting in, 34 



Springtails, 3i» 9i, I79, IQO- 

 192, 226 



Stargrass, water, 88-89 



Statoblasts, 132, 133, 138 



Stejiostomum, 121; leucops, 

 124-125 



Stentor, 56 



Sternotherus odoratus, 393- 



394. 396 

 Stick worms, 247 

 Sticklebacks, 326, 327, 339- 



341; brook, 326, 339-341 

 Stonecats, 337, 338 _ 

 Stoneflies, Frontispiece, 22, 



34, 179, 185, 188, 189, 193- 



198, 282; adults, 193-194; 



aquarium study, 195; as 



food, 243; associates, 195; 



habits, 194; nymphs, 193; 



parts of, 180-182 



Stoneworts, 31, 46, 53, 54 

 Storage of insects, 42 

 StratiomyiidcB (soldier-flies), 



283, 299 

 Streams, collecting in, 33, 34; 



life in, 20, 21 

 Streptoneura, 307 

 Sturgeon, food of, 303 

 Suckers, 33^-333 

 Sundews, 98-99 

 Sunfish, 152, 325, 326, 341- 



342; common, 340 

 Surface, on turtle diet, 398 

 Surface water, collecting in, 



32-33 

 Swallows, 25 



Swammerdam, J., 164 



Sympetrum, 217-218 



SyrphidcB (syrphus-flies), 79, 



282, 299-300 

 Syrphus flies, 79, 282, 299- 



300 ; larvae, 300 



TabanidcB (horse-flies), 283, 

 298-299 



Tabanus, 299; atratus, 299 



Tadpoles, 12, 30, 35, 39, 41, 

 116, 152, 170,270,271,275, 

 347, 348, 349, 350, 352 



TcBfiiopteryx, Frontispiece ; ni- 

 valis, 197, 198 



TanyderidcB, 287 



Tape worms, 119 



Temperature, of water, 8-9 



Tenspots, 216-217 



Testudinata (turtles), 389- 

 404; Chelydridce, 391-393; 

 KinosternidcB, 393-397 ; Tes- 

 tudinidcB, 397-402; Triony- 

 chidcB, 402-404 



TestudinidcB (pond and land 

 turtles), 397-402 



Threadworms, 1 39-141 



Thrips, 95 



Tiger-beetles, food of, 17; 

 larvae of, 15 



Tipiila abdominalis, 34, 289 



TipulidcB (craneflies), 283, 

 287, 288-289 



Tipuloidea (craneflies), 283- 

 289; PtychopteridcB, 287- 

 288; TipulidcB, 288-289 



446 



