Index 



425 



PAGE 



crops, diversifying of 403 



crowfoots 156, 271 



Crucigenia 129, 130 



Crustacea 183, 189, 192, 193, 301,, 302 



Crustaceans 20, 45, 52, 161, 183, 



187, 251, 253, 285, 299, 



304, 318, 340, 345, 382, 



383, 399 



Culex 280, 329 



Culicidae 227 



current 83, 85, 356 



current meter 86, 319 



currents, conduction 31 



" convection 31, 38, 292 



" descending 36 



Curtis, W. T 290 



cuticle 271 



Cyanophyceae 132 



Cybister 275 



Cyclops 188, 189, 244, 263, 301, 303, 



305, 310, 311, 312 



Cyclotella 112, 114, 299 



Cylindrocystis 116, 119 



Cyperus diandrus 207 



Cypripedium 351 



Cypris 188 



cyst 289, 290, 291, 292 



Dace 374 



Dachnowski's diagram 352 



damselflies 195, 207, 279, 280, 281, 



332. 341, 346 

 Daphne 185, 186, 248, 301, 306, 309, 



312, 391 



Daphnia 285, 292, 303, 304, 306 



darters, least 231, 233 



darters 250, 259, 362, 374 



Darwin, Charles 17, 18, 283, 285 



Decapoda 191 



Decodon 354 



decomposition 48 



defense 251 



deltas 60, 65 



Delta of Mississippi 67 



Dero 173. 174.257 



desiccation 316, 318 



Desmidium ii7 



desmidssi 52, 53,116,117,119, 

 121, 144, 263 



Diaphanosoma 301, 304 



Diaptomus loi, 188, 189, 30?^^ 303, 



305, 311 



Diatoma ii5, 245, 297 



PAGE 



diatomaceous earths no 



diatomaceous ooze 86 



diatoms 29, 53, 81, 84, loi, 109, no, 



IIS, 144, 183, 189, 206, 217, 



248, 297, 302, 303, 305, 311, 



362, 387, 394, 395, 399 



diatoms, colonial 391 



" epiphytic 115 



needle 112 



" sessile 395 



" slime-coat 322, 336 



' 'white-cross' ' in 



diatom rakes 373 



Dictyosphaerium 129 



Dicranomyia 359 



Didymops 340 



DifHugia 159, 257, 299, 303 



Diglena 299 



Dinobryan loi, 106, 107, 246, 296, 

 . 303. 308, 310, 337 



Dinocharis 299 



Diptera 195, 224, 337 



Diptera, aquatic 225 



" blood-sucking 227 



discs, attachment 171 



" respiratory 230 



" sucking 228 



dissolved colloids 54 



distribution 266, 322, 339, 389 



distribution, vertical 310, 324 



ditches 133, 152, 169, 345 



ditch-grass 71 



Diurella 299 



divers 239, 241 



divers, pearl 30 



Dixa 329 



dobsons 213 



Docidium 119 



dogwood 351 



Dolomedes 346 ' 



Donacia 337, 346 



Dorosoma 399 



dragonflies 195, 197, 207, 254, 280, 

 332, 340, 341. 356, 389 407 



drainage 402 



Drapamaldia 124, 128 



Droseraceae 156 



Drosera 283 



drouth 97 



Dryops 370 



duckmeat 149, 161, 240 



ducks 239, 240, 342 



duckweeds. . .150, 153, 272, 321, 334 



