INDEX 



IIOI 



Monas, 246; fluida, 246 



Monhystera, 500; sentiens, 500 



Monocilia, 164 



Monogenea, 374 



Monogononta, 587 



Mononchus, 486; major, 486 



Monopisthocotylea, 374 



Monopylephorus, 641 



Monopylidium, 446 



Monosiga, 258; ovata, 258 



Monospilus, 738; dispar, 738 



Monostoma, 382; qffine, 382, amiuri, 382, 



aspersum, 382, faba, 384, incommodum, 382, 



molle, 397, mutabile, 382, ornatum, 382, 



spatulatum, 382 

 Monostomata, 382 

 Monostome cercariae, 412 

 Monostomum, 382 

 Monostroma, 161; bullosum, 161 

 Monostyla, 595; lunaris, 595 

 Monozooic cestodes, 429 

 Moss animalcules; see Animalcules; Bry- 



ozoa 



Moths, aquatic; see Insecta; Lepidoptera 

 Mougeotia, 138, 143 

 Musculium, 1019; partumeium, 1019 

 Mycoideaceae, 171 

 Myosyringata, 522 

 Myriophyllum spicalum, 182 

 Mysidacea, 829; see Malacostraca 

 Mysidacea, 844 

 Mysis^relicta, 844 

 Myxonema, 168; lubricum, 168 

 Myxophyceae; see Algae, Blue-Green 



Naiasflexilis, 191, major, 193 



Naididae, 638 



Naidium, 640; osborni, 640 



Nais, 639; communis, 639, elinguis, 639 



Najadicola, 872; ingens, 872 



Nannoplankton, 6, 7, 84; centrifuge, 84, 



Sedgewick-Rafter sand filter, 83, study, 84, 



(quantitative), 83; see Plankton 

 Nannothemis (imago), 926, (nymph), 932 

 Nasiaeschna (imago), 925, (nymph), 930 

 Nassula, 276; ornata, 276 

 Natural waters, bacteria in, 96 

 Naucoridae, 933 

 Naupjius of cyclops, 744 

 Navicula, 128; rhynchocephala, 128 

 Naviculaceae, 127 

 Nebela, 226; cottaris, 226, dentistoma, 227, 



flabellum, 226, lageniformis, 226 

 Necator americanus, 512, 521 

 Nehallennia (imago), 923, (nymph), 928 

 Nelumbo, 181 

 Nemathelminthes (roundworms), 15, 506; 



see Acanthocephala; Gordiacea; Nema- 



toda 

 Nematocera (larva), 943 



Nematoda (free-living and parasitic round- 

 worms), Fresh-Water 16, 365; see Nema- 

 toda, Free-Living: Nematoda, Parasitic 



Nematoda, Free-Living, 459-505; amphids, 

 466, bursa, 476, cuticula, 463, development, 

 464, digestive system, 467, distribution, 462, 

 esophagus, 468, excretory organ (renette), 

 470, formula, 481, habitats, 459, key, 482- 

 505, locomotion, 470, methods of study, 

 478, number, 460, occurrence, 460, refer- 

 ences, 505, renette, 470, roundworms, 459, 

 sexual organs, 471, spicula, 475, structure, 

 461, 462, threadworms, 459; see Nema- 

 toda 



Nematoda, Parasitic, 506-510; 510-535; 

 bursa, 514, development, 516, esophagus, 

 513, key, 520-535, life history, 517, 519, 

 movement, 511, oral apparatus, 513, refer- 

 ences, 551-552, reproductive system, 516, 

 structure, 511, tail, 514, threadworms, 511; 

 see Acanthocephala; Gordiacea; Nematoda 



Nematoideum integumenti lumbriculi limosi, 

 521 



Nematomorpha, 510 



Nematotaenia, 450; dispar, 450 



Nematotaeniidae, 449 



Nemertina (Nemerteans), Fresh- Water, 15, 

 454-458; development, 457, habitats, 454, 

 occurrence, 457, references, 458, struc- 

 ture, 455 



Neoechinorhynchidae, 545 



Neoechinorhynchus, 545; cylindralus, 546, 

 emydis, 546, gracilisentis, 545, tenellus, 546 



Neomermis, 503 



Neoplanorbis, 986; tanlillus, 986 



Nepa, 934 



Nephelopsis obscura, 659 



Nephrocytium, 152; agardhianum, 152 



Nepidae, 934 



Nereis limnicola, 632 



Neritidae, 994 



Neritina, 994; redivata, 994 



Nerthriidae, 933 



Net plankton, 6 



Netrium, 138; lamellosum, 138 



Nets, 61; Birge, 68, care of, 66, closable 

 plankton, 77, dip, 67, errors of plankton, 78, 

 fyke, 63, gill, 64, quantitative plankton, 74, 

 runner, 70, tow, 72, trammel, 62, turtle, 66 



Neumania, 871; spinipes, 871 



Neurocordulia (imago), 926 



Neuroptera (dobson, fish and spongilla flies), 

 Fresh- Water, 897-899; keys, (adults), 934- 

 935, (larvae), 917, 935-936; see Hemero- 

 biidae; Insecta; Siah'didae 



Niphargus, 843 



Nitella, 173 



Nitelleae, 173 



Nitzschia, 130; linearis, 130, sturionis, 374 



Nitzschiaceae, 130 



