PAGE 



aborigines 382 



acids, humous 95, 96, 348 



Acilius 333 



Acorus 157 



Acroperus harpae 300, 301 



adaptations 260, 274, 277 



Adineta 299 



adjustment 248, 261 



adjustments, individual 242 



mutual 242, 282 



adjustability to waves 319 



aeration 73 



Agassiz, Louis 19 



Agraylea 216 



agriculture 379, 402 



agricultural crops 404 



air-breathing 231 



air-chambers 275, 277 



air-spaces 265, 271 



air-tubes 279 



albumins 48 



alder 158, 351, 352 



ale-wives 232, 373 



algae, 26, 28, 29, 45, 46, 72, 



IOO, IOI, IO2, 110, 119, 137, 



144, 145, 151, 169, 180, 181, 



183, 189, 217, 220, 223, 295, 



296, 301, 302, 304, 307, 311, 



322, 391, 345, 356, 362, 373, 



390, 395 



algae, "blanket" 336, 345, 399 



blue-green 



109, 132, 297, 302, 326 

 filamentous blue-green 296, 310 



brown 135, 136 



fresh water 101 



free-swimming 28, 339 



gelatinous 101 



green 124, 129, 299, 302 



filamentous green 124 



plancton 50, 244, 392 



protococcoid green 318 



lime-secreting 50 



marine 135 



of ponds 335 



red 135, 136 



120, 126, 336 



PAGE 



algae, siphon 121 



44 slime-coat 335 



tufted 112, 126 



" unicellular 112, 126 



Allen, Arthur A 95, 342 



Alismaceae 156 



Alisma 334 



alligators 238 



Ambystoma tigrinum 237, 342 



ammonia 25, 48, 49, 140 



Amoeba 159 



amphibians. . . 148, 231, 236, 237, 337 



Amphipoda 189, 191, 341 



Amphizoidae 224 



Anabaena 132, 133, 295, 296, 297, 

 35, 3 8 , 392 



Anacharis 155 



Anapus 299 



Anax. . 155, 341, 389 



junius 196 



Ancylus 182, 260, 370, 373 



Andromeda 157, 350 



angling 407 



animalcules 295 



animal forage 387, 399 



animal husbandry 384, 400, 408 



animals, hoofed 312 



animals, limpet-shaped 260 



animal life of marshes 345 



animal population 324 



animals, warm-blooded 273 



Ankistrodesmus falcatus 129 



setigerus. . .129, 131 



Anodonta 180, 288, 290 



edentula 324 



" grandis 324 



imbecillus 288 



antennae 185, 189, 247, 251, 312 



Anthomyid fly 359 



Anthophysa 162 



Anthony, Maude H 214, 215 



Anuraea 299, 300, 303 



Aphanizomenon 297, 304, 392 



apical buds 154, 138 



Appalachian hills 60 



applied science 21 



Apsilus 299 



421 



