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 117 



^desmidssi 52, 53, 116, 117, 119, 



121, I44, 263 



Diaphanosoma 301, 304 



Diaptomus 101, 188, 189, 301, 303, 



305, 3ii 

 Diatoma 115, 245, 297 



PAGE 



diatomaceous earths 1 10 



diatomaceous ooze 



diatoms 29, 53, 81, 84, 101, 109, no 

 115, 144, 183, 189, 20O, j 1 7, 

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

 362, 387, 394, 395, 399 



diatoms, colonial 391 



" epiphytic \\- 



" needle 1 1 2 



" sessile 



" slime-coat 322, 



" "white-cross" 1 1 1 



diatom rakes 373 



Dictyosphaerium [29 



Dicranomyia 359 



Didymops 340 



Difflugia 159, 257, 299, 303 



Diglena 299 



Dinobryan 101, 106, 107, 24<.. 

 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, 33 



distribution, vertical 310, 324 



ditches 133, 152, [I 



ditch-grass 71 



Diurella 



divers 239, 241 



divers, pearl 3° 



Dixa 329 



dobsons 213 



Docidium 1 19 



dogwood 



Dolomedcs 



Donacia 33; 



Dorosoma 



dragonilies 195, [97, 



332, 340, 34i. 356, 389 



drainage 4 n - 



Draparnaldia 124, 128 



Droseraceae 



Drosera 



drouth 97 



Dryops 



duckmeat I49i '' 



ducks 



duckweeds. .. 15c 153, 272. 321, 334 



