Index 



437 



PAGE 



tentacles 176 



terns 342 



Tetmemorus 119 



Tetrapedia 130, 299 



Tetraspora 129, 131 



thallus 153 



thermocline 37, 39, 72, 309, 311 



thoracic appendages . . . .183, 188, 189 



Thysanura 195 



Tipulidae 297 



Tipula 360 



tides 73 



toads 236, 237 



Tseniopteryx 279 



topography 74 



trachea 275 



tracheae 270, 278, 279 



Trachelomonas 103, 108 



tracheoles 278, 279 



transpiration 348 



Trembly 16 



Tria;nodes 215, 218, 280, 337 



Triarthra 299, 300 



Tribonema 124, 126 



Trichobacteria 141, 142 



Trichodesmium 101 



Trichoptera 195, 214 



trochophores 250 



Trochosphaera 178 



trout 163, 176, 313, 385, 393, 394 



trumpets, respirator}^ 277, 280 



tubercles 256 



tube-dwellers 370 



tubes 121, 226, 240, 278, 372 



tubers 272, 380, 382 



Tubifex 173, 174, 254, 340 



turtles 175, 238, 343, 390 



tusks, mandibular 255, 256 



Typhaceae 156 



Typha 91,321,334,346 



Ulothrix 124, 336 



Unio 181,323, 324 



L'rodela 236 



Uroglena 295 



Utricularia 117, 155, 284, 285 



Vacuoles 310 



Vallisneria 153, 240 



valves 109, 252, 273, 288 



vapor 55 



vaporization 40 



Vaucheria . 121 



PAGE 



vegetable forage 399 



vegetative propagation 272 



ventral suckers 367 



vertebrates 239, 374, 382 



Volvox. .101, 104, 105, 245, 282, 337 

 Vorticella 161, 295, 299 



Ward, H. B 28, 312 



waste wet lands 401, 402, 407 



water-boatman 201, 211, 276 



water-birds 239, 240 



water-bloom 14, 15, 101, 104, 106, 

 129, 132, 133, 161, 295, 

 296, 299 



water-borne diseases 21 



water-bugs 195, 210, 276, 318 



water-content 26 



water-cress 145 



water crops 392, 403 



water crowfoot 156, 319, 344 



water culture 377, 378, 379, 391, 400 

 401, 402, 403, 404, 406, 

 409 



waterfalls 64, 80, 81, 117, 358 



water-fern 134, 145, 149, 334 



water-fleas 19, 185, 186, 246, 247, 248, 

 249, 266, 267, 269, 285, 306, 

 327,328,387,390,391,392 



waterfowl 91, 239, 380. 409 



water-garden 378,404, 407, 409 



water-glass 409 



water hemlock 345 



water hornwort 319 



water-lily 154, 334, 382, 404 



water-meadows 153, 406 



water milfoil 154, 155, 319 



water-mites 193, 194, 301 



water mold 140, 143, 144 



water mosses 146, 148 



water-net 122, 123 



water-penny 224, 260, 368 



water-plantain 324, 345 



water plants 100 



water power 403 



water purslane 156 



water reservoirs. . .169, 349, 401, 402 



water-scorpion 212 



water- shamrock 149, 405, 407 



water shield 154, 334, 405 



water-skaters 360 



water snakes 238, 343 



water-striders 237 



water table 58, 70 



