mo 



INDEX 



Trentonia, 265; fiagellata, 265 



Trepomonas, 249; agilis, 249 



Triaenophorinae, 433 



Triaenophorus, 433 



Triangle dredge, 71 



Triarthra, 613; brachiata, 613, longisela, 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 (caddisiiies), Fresh-Water, 900- 

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

 pupa, 902; see Insecta 



Tricorythus (nymph), 922 



Trichosoma contortum, 513 



Trichostomina, 277 



Trichostrongylidae, 522 



Trichostrongylinae, 522 



Trichostrongylus, 522; fiberius, ,?22 



Trichosyrhagata, 534 



Trichurinae, 534 



Trichuris, S34; opaca, S34 



Tricladida, 333, 354, 361 



Trilobus, 501; longus, 501 



Trinema, 231; camplanatum, 231, enchdys 

 232, linear e, 232 



Triophthalmus, 589; dorsualis, 589 



Triphylus, 599; lacustris, 599 



Triploceras, 139; gracile, 139 



Tripyla, 498; lata, 498 



Tristomidae, 374 



Tritigonia, 998; luberculala, 998 



Trochehninthes, 16 



Trochiscia, 154; iieslitus, 154 



Trochosphaera, 613; solstitialis, 613 



Trochosphaeridae, 613 



Trochospongilla, 308; korrida, 308, leidyi, 308 



Troglotrematidae, 390 



Tropidiscus, 983 



Tropidoscyphus, 254, 257 



Tropisternus (adult), 940 



Truncilla, 1008; Joliata, 1009, personata, 1009, 

 sulcata, 1008, triquetra, 1008; a. a., 1008 



Tryonia, 989; clathrata, 989 



Trypanorhyncha, 434, 450 



Tubefla, 313; pennsyhanica, 313 



Tubifex, 642; mulHsetosus, 641, 642, tubifex, 

 641, 642 



Tubificidae, 640 



Tulotoma, 988; magnifica, 988 



Tuomeya, 176; fiumatalis, 176 



Turbellaria (tree-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 stimuli, 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 life, 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; satulosa, 236 

 Urceoius, 256; cydostomum, 256 

 Urnatella gracilis, 951 

 Urnula, 299 



Urocentrum, 277; turbo, 277 

 Uroglena, 261; americana, 261 

 Uroleptus, 288; nmsculus, 288 

 Uronema, 279; marinum, 279 

 Urosoma, 290 



Urostyla, 287; grandis, 287, trichogaster, 287 

 Urotricha, 273; Jarcla, 273 

 Utricularia, 188; injlata, 188, minor, 188 



Vacuoles, 103 



Vagi]\arieae, 109 



Vaginicola, 296; leptosoma, 296 



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



190 

 Valvata, 988; tricarinata, 988 

 Valvatidae, 988 

 Vampyrella, 234; laieritia, 234 

 Vanheurckia, 128; rhomboides, 128 

 Variety of fresh- water life (biology), 11 

 Vaucheria, 172; repens, 172 

 Vegetation, amount, 50 



