INDEX 



I lOI 



Monas, 246; fluida, 246 



Monhystera, soo; seniiens, 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; affi,ne, 382, amitiri, 382, 



aspersum, 2,^2, f aba, 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 spicatum, 182 

 Mysidacea, 829; see Malacostraca 

 Mysidacea, 844 

 Mysis relicta, 844 

 Myxonema, 168; hibricum, 168 

 Myxophyceae; see Algae, Blue-Green 



Naias flexilis, 191, major, 193 



Naididae, 638 



Naidium, 640; osborni, 640 



Nais, 639; communis, 639, elingiiis, 639 



Najadicola, 872; ingens, 872 



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



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



(quantitative), 83; ^ec Plankton 

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

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

 Nassula, 276; ornata, 276 

 Natural waters, bacteria in, 96 

 Naucoridae, 933 

 Nauplius of Cyclops, 744 

 Navicula, 128; rhynchocephala, 128 

 Naviculaceae, 127 

 Nebela, 226; collaris, 226, dentisioma, 227, 



flabellum, 226, lageniformis, 226 

 Necator americanus, 512, 521 

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

 Nelumbo, 181 

 Nemathelminthes (roundworms), 15, So<'s 



see Acanthocephala; Gordiacea; Nema- 



toda 

 Nematocera (larva), 943 



Nrinattxla (frce-livinR and parasitic round- 

 worms), 1- rrsh-Wulcr i*',, j^s; ice Nana- 

 ti)da, Itli- Livins: \emal(Kla. Parasitic 



Nemaloda, 1-rec LivinK. 4 5t« So.s: amphid*. 

 466, bursa, 47r», tulicula, 46.}. development, 

 464, digestive system, 467, di.stribution, 46a, 

 esophagus, 468, excretory orjcan (ntulle), 

 470, formula, 481, habitatn, 459, kc>-, 482- 

 505, locomotion, 470. methods of »tudy, 

 478, numlKT, 4r)0, occurrence, 460, refer- 

 ences, 505, rctictte, 470, roundworms. 459, 

 sexual organs, 471, spicula, 475, structure, 

 461, 462, threadworms, 459; see NemA- 

 loda 



Ncmatoda, Parasitic, 506-510; 510-SJS; 

 bursa, 514, development, 516, csophaini&. 

 513. key, 520-535, life histor>-. 517. 519, 

 movement, 511, oral apparatus, 513, refer- 

 ences, 551-552, reproductive system, 516. 

 structure, 511, tail, 514. threadworms 511; 

 ^ff Acanthocephala; Gordiacea; Nematoda 



Nematoideum integumenti lumbruuli limosi, 

 521 



Nematomorpha, 510 



Nematotaenia, 450; dispar, 450 



Nematotaeniidae, 449 



Nemertina (Xemerteans), Fresh- Water, 15, 

 454~458; development, 457, habitats. 454. 

 occurrence, 457, references, 458, struc- 

 ture, 455 



Neoechinorhynchidae, 545 



Neoechinorhynchus, 545; cylindrattu. 546. 

 emydis, 546, gradlisentis, 545, ttntUui, 546 



Neomermis, 503 



Neoplanorbis, 986; tantiUus, 986 



Nepa, 934 



Nephdopsis obscura, 659 



Ncphrocytium, 152; agardhianum, 152 



Nepidae, 934 



Nereis limnicola, 63.' 



Neritidae, 994 



Xeritina. 994; redivata, 994 



Nerthriidac, 933 



Net plankton, 6 



Netrium, 138: latnrlhsum, 138 



Nets, 61; Birge. 68. care of. 66, closahlc 

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

 fyke, 63, gill, 64, cjuantitative plankton. 74. 

 runner, 70. tow, 72, trammel, 63, turtle. 66 



Neumania. 871; spinipes, S71 



Neurocordulia (imago), 926 



Xeuroj^tera (dobson. fish and sponirilU flies), 

 Fresh-Water, 8tj7-89y: keys, (adults). 934* 

 935, (lar\ae), 917. 935-9J6; see Ilcracn>- 

 biidae; Insocta; Sialididac 



Xiphargus, 843 



Nitella. 173 



Xitelleae, l^^ 



Nitzschia, 130: linearis, 13c, sturionis, 374 



NiLzschiaceae, ijo 



