mo 



INDEX 



Trentonia, 265; flagellata, 265 

 Trepomonas, 249; agilis, 249 

 Triaenophorinae, 433 

 Triaenophorus, 433 

 Triangle dredge, 71 



Triarthra, 613; brachiaia, 613, longiseta, 613 

 Tribonema, 164; minor, 164 

 Trichinella spiralis, 534 

 Trichinellidae, 534 

 Trichocephaloides, 444 

 Trichoda, 279; pura, 279 

 Trichodina, 291; pediculus, 291 

 Trichogaster, 286 

 Trichomastix, 250 

 Trichophoreae, 113 

 Trichophrya, 299; sinuosa, 299 

 Trichoptera (caddisflies) , Fresh- Water, 900- 

 903, 917. 936-937; cases, 900, key, 936-937. 

 pupa, 902; see Insecta 

 Tricorythus (nymph), 922 

 Trichosotna contortum, 513 

 Trichostomina, 277 

 Trichostrongylidae, 522 

 Trichostrongylinae, 522 

 Trichostrongylus, 522; fiberius, 522 

 Trichosyringata, 534 

 Trichurinae, 534 

 Trichuris, 534; opaca, 534 

 Tricladida, 333, 354, 361 



Trilobus, 501; longus, 501 



Trinema, 231; camplanatum, 231, enchelys, 

 232, lineare, 232 



Triophthaknus, 589; dorsualis, 589 



Triphylus, 599; lacustris, 599 



Triploceras, 139; gracile, 139 



Tripyla, 498; lata, 498 



Tristomidae, 374 



Tritigonia, 998; tuberculata, 99S 



Trochehninthes, 16 



Trochiscia, 154; vestilus, 154 



Trochosphaera, 613; solstitialis, 613 



Trochosphaeridae, 613 



Trochospongilla, 308; horrida, 308, leidyi, 308 



Troglotrematidae, 390 



Tropidiscus, 983 



Tropidoscyphus, 254, 257 



Tropistemus (adult), 940 



Truncilla, 1008; foliata, 1009, personata, 1009, 

 sulcata, 1008, triquetra, 1008; s. s., 1008 



Tryonia, 989; clathrata, 989 



Trypanorhyncha, 434, 450 



Tubefla, 313; pennsylvanica, 313 



Tubifex, 642; miiltisetosus, 641, 642, tubifex, 

 641, 642 



Tubificidae, 640 



Tulotoma, 988; magnifica, 988 



Tuomeya, 176; fluviatalis, 176 



Turbellaria (free-living flatworms), Fresh- 

 Water, 15, 323-364; cultures, 331, digestive 

 apparatus, 325, habitat, 329, key, 333-364. 



land planarians, 330, methods of study, 

 331, movement, 325, photokinesis, 328, 

 references, 364, reproduction, 326, respon- 

 siveness to stimuh, 328 



Turbidity of fresh water, 29, 36 



Turtle nets, 66 



Two-winged flies; see Diptera; Insecta 



Tylenchus, 483; devastatrix, 483, dipsaci, 483 



Types of fresh-water hfe, 13 



Typhlocypris, 823; delawarensis, 824, peircei, 

 823 



Typhloplana, 350; viridata, 350 



Typhloplanid from Canandaigua Lake, 361, 

 362; from Irondequoit, 361, 362 



Typhloplanidae, 348, 361 



Typhloplanini, 349 



Tyrrellia, 869; circularis, 869 



Ulothrix, 162; zonata, 162 



Ulothrichaceae, 161 



Ulvaceae, 160 



Ulvella, 171; americana, 171 



Under- water photography, 86; see Methods 



of Photographing 

 Uniformity of fresh-water life (biology), 13 

 Unio, 1000; crassidens, 1000, spinosus, looi, 



tetralasmus, looi, uniomerus, looi 

 Unionicola (non-parasitic species), 871 

 Unionicola (parasitic species), 872; crassipes, 



872 

 Unionidae, 995 

 Unioninae, 995 

 Univalve, 957; see Mollusca 

 Uranotaenia (larva), 944 

 Urceolaria, 292 



Urceolopsis, 256; sabulosa, 256 

 Urceolus, 256; cycloslomum, 256 

 Urnatella gracilis, 951 

 Umula, 299 



Urocentnmi, 277; turbo, 277 

 Uroglena, 261; americana, 261 

 Uroleptus, 288; musculus, 288 

 Uronema, 279; marinum, 279 

 Urosoma, 290 



Urostyla, 287; grandis, 287, trichogaster, 287 

 Urotricha, 273; farcta, 273 

 Utricularia, 188; infiata, 188, minor, 188 



Vacuoles, 103 



Vaginarieae, 109 



•Vaginicola, 296; kptosoma, 296 



VaUisneria, 181, 190; spiralis, 181, 185, 189, 



190 

 Valvata, 988; tricarinata, 988 

 Valvatidae, 988 

 Vampyrella, 234; lateritia, 234 

 Vanheurckia, 128; rhomboides, 128 

 Variety of fresh-water life (biology), 11 

 Vaucheria, 172; re pens, 172 

 Vegetation, amount, 50 



