IIIO 



INDEX 



Trentonia, 265; flagellata, 265 



Trepomonas, 249; agilis, 249 



Triaenophorinae, 433 



Triaenophorus, 433 



Triangle dredge, 71 



Triarthra, 613; brachiata, 613, longiseta, 613 



Tribonema, 164; minor, 164 



Trichinella spiralis, 534 



Trichinellidae, 534 



Trichocephaloides, 444 



Trichoda, 279; pur a, 279 



Trichodina, 291; pediculus, 291 



Trichogaster, 286 



Trichomastix, 250 



Trichophoreae, 113 



Trichophrya, 299; sinuosa, 299 



Trichoptera (caddisflies), Fresh- Water, 900- 

 93, 9i7 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, 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 



Triophthalmus, 589; dorsualis, 589 



Triphylus, 599; lacustris, 599 



Triploceras, 139; gracile, 139 



Tripyla, 498; lata, 498 



Tristomidae, 374 



Tritigonia, 998; tuber culata, 998 



Trochelminthes, 16 



Trochiscia, 154; vestiius, 154 



Trochosphaera, 613; solstitialis, 613 



Trochosphaeridae, 613 



Trochospongilla, 308; horrida, 308, leidyi, 308 



Troglotrematidae, 390 



Tropidiscus, 983 



Tropidoscyphus, 254, 257 



Tropisternus (adult), 940 



Truncilla, 1008; foliata, 1009, per sonata, 1009, 

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



Tryonia, 989; dathrata, 989 



Trypanorhyncha, 434, 450 



Tubefla, 313; pennsyhanica, 313 



Tubifex, 642; multisetosus, 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 stimuli, 328 



Turbidity of fresh water, 29, 36 



Turtle nets, 66 



Two-winged flies; see Diptera; Insecta 



Tylenchus, 483; de-vastatrix, 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, 1001, 



tetralasmus, 1001, uniomerus, 1001 

 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; cyclostomum, 256 

 Urnatella gracilis, 951 

 Urnula, 299 



Urocentrum, 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; inflata, 188, minor, 188 



Vacuoles, 103 



Vaginarieae, 109 



Vaginicola, 296; leptosoma, 296 



Vallisneria, 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), n 

 Vaucheria, 172; repens, 172 

 Vegetation, amount, 50 



