634 INDEX 
Leucorhinia, 9, 13, 16. 
Libellula, 5, 13, 14, 16, 17, 23, 64, 79, 88. 
Libellulidz, 4, 5, 6, 8, 9, 12, 13, 16, 22, 25, 
26, 27, 28, 20, 51. 
Libelluline, 5. 
Lippia, 246. 
Macrogomphus spiniceps, 87. 
Macromia, 5, 10, 16, 30. 
illinoiensis, 64. 
Macronema zebratum, 73. 
Mallomonas, 225. 
Mastigocerca, 516. 
Mastigophora, 516, 518, 519, 523, 530, 533, 
534, 535, 614. 
Melosira, 225, 256, 375, 389, 493, 500, 518, 
532. 
spinosa, 516. 
varians, 516. 
Meridion circulare, 516. 
Mesothemis, £2, 15, 16, 17, 23. 
collocata, 13. 
simplicollis, 75. 
Metopidia solidus, 516. 
Micropterus pallidus, 562. 
Moina, 369, 544, 546. 
micrura, 300. 
Mollusca, 17, 47, 154, 486, 500, 563. 
N 
Naias, 243, 246, 415, 597. 
flexilis var. robusta, 240, 245. 
Nasizeschna, 30, 32, 33-35. 
pentacantha, 7, 34-35, 36. 
Nasturtium palustre, 237. 
sessiliflorum, 237. 
Navicula, 516. 
Negundo aceroides, 108. 
Nelumbo, 385, 415. 494. 
lutea, 237. 
Neureschna furcillata, 36. 
Nitella, 236. 
Nitszchia sigmoides, 516. 
Notholca acuminata, 297. 
jugosa, 516, 518. 
Notonecta, 17, 18. 
Nympheea, 51, 251, 384, 385, 494. 
reniformis, 237. 
oO 
Odonata, I-94. 
Oligochzeta, 486, 500, 513. 
Ophiogomphus, 14, 57. 
carolus, 59. 
Oscillaria, 181, 182, 245, 256, 386, 415, 493, 
500, 516, 592, 597- 
Ostracoda, 516, 519. 
P 
Pachydiplax, 13, 16. 
longipennis, 11. 
Pantala, 6,°13, 16. 
Pelocoris, 47. 
Perca flavescens, 18. 
Peridinide, 225. 
Perithemis, 16. 
domitia, 7. 
Petaluridz, 4, 21, 22, 25, 26, 27, 51. 
Phacus longicauda, 516. 
Phanerogamia, 415. 
Philodina megalotrocha, 516. 
Physa, 17. 
Planaria, 513. 
Platanus occidentalis, 108. 
Plathemis, 14, 16. 
Platydorina, 95. 
Pleodorina illinoisensis, 95. 
Pleurosigma angulatum, 516. 
Ploima, 500, 5109. 
Plumatella, 152. 
Polyarthra, 297. 
platyptera, 297, 518. 
Polygonum, 152, 237, 242, 246, 240. 
amphibium, 238, 246, 251. 
Polyodon, 196, 563, 568. 
Pomoxis annularis, 17. 
Pontederia, 494. 
cordata, 237, 239. 
Populus monilifera, 108. 
Potamogeton, 236, 238, 244, 246, 247, 248, 
251, 368, 415, 582, 594, 595, 597, 
598. 
natans, 240, 243, 245, 246, 251. 
pectinatus, 240, 242. 
pusillus, 240. 
Progomphus, 10, 14, 16, 52, 53, 55-56, 65. 
obscurus, 55-56. 
