INDEX 



1095 



Eutreptia, 252; viriois, 252 



Excentrosphaera, i:^; viridis, 153 



Existence, conditior -of, 21-60; bottom mate- 

 rials, 24, different -tion in bottom material, 

 25, distrib'ition of life, 35, in lakes, 23, in 

 Lake Michigan, 35, dormancy, 43, mutk 

 bottons, 26, references, 60, terriginous bot- 

 toms, 26 



Eylaidae, 860 



Eylais, 860; extendens, 860 



Fairy shrimps; see Phyllopoda 



Fasciola, 389; hepalica, 389 



Fasciolidae, 389 



Fasciolinae, 389 



Fascioloides, 389; magna, 389 



Fasciolopsis, 389 



Fauna relicta, 10 



Faxonius, 848 



Ferrissia, 985 



Filaria, 524; amphiutnae, 524, ardeariim, 524, 

 cingula, 525, cistudinis, 524, hcliciniis (Pcle- 

 citus), 524, nilida, 524, physalura, 525, 

 solitaria, 521, 524, stigmatura, 527, triae- 

 nucha, 526, wymani, 524 



Filariidae, 524 



Filarioidea, 523 



Filaroides, 522; mustelarum, 522 



Filicollis, 548, 551; analis, S49, botulus, 549, 551 



Fimbraria, 449; plicata, 449 



Fimbriariidae, 449 



Fishes, Fresh-Water, 1029-1065; adapt- 

 ations, 1039, adjustment to biological en- 

 vironment, 1055, to current, 1053, to light, 

 1054, to temperature, 1050, dispersal, 1037, 

 enemies of, 106 1, homes, 1042, migration, 

 1040, nests, 1043, number, 1033, origin, 

 1032, 103s, of adapted faunas, 1064, 

 plankton and fish life, 1082, references, 

 1066, secondary sexual characters, 1047; see 

 Vertebrata 



Fish-flies (Sialididae); see Insecta, Neurop- 

 tera, Sialididae 



Fish life, plankton and, 1082 



Flagella, 238 



Flagellate protozoa; see Mastigophora 



Flatworms (Platyhelminthes), 15; free-liv- 

 ing; see Nemertina and Turbellaria; para- 

 sitic; see Parasitic Flatworms 



Fleas, aquatic; see Cladocera 



Flexiphyllum, 274; elongatiim, 274 



Flies; black; see Insecta and Simuliidae; 

 damsel, dragon; see Insecta and Odonata; 

 fish; see Insecta and Neuroptera; two- 

 winged; see Diptera and Insecta 

 Florideae, 175 

 Floscularia, 609; campanulata, 561. 609, cdcn- 



tata, 609, proboscidea, 609, iiniloba, 609 

 Floscularida, 572, 609 

 Flosculariidae, 572, 609 



Flowing waters, 2 



Fluctuations in numl>ers of organisms, 54 



Flukes; see Trcmatoda 



Fluminicola, 991; nutlalliana, 991 



Food relations of aquatic animals, 53, 54 



Foraminifcra, 2^2 



Fordycc pump, 79 



Fragilaria, 132; crototicnsis, 132 



Fragilariaceae, 132 



Franceia, 155 



Frederkella sultana, 952 « 



Free-living flatworms; sec Ncmcrlcans and 

 Turbellaria 



Free-living nematodes; see Ncmatoda, free- 

 living 



Free-living Roundworms; sec Nematoda, free- 

 living 



Fresh-water algae, biology, life, etc.; see Al- 

 gae, Biology, Life, etc.. Fresh-water 



Frontipoda, 868; musculus, 868 



Frontonia, 280; Iciicas, 280 



Funiculus, 948 



Furcocercous cercariae, 422 



Furcularia, 589; forficula, 589. longisela, 589 



Fusconaia, 997 



Fyke nets, 63 



Gadinia, 980; reticulata, 9S0 



Gadiniidae, 980 



Galba, 982 



Galerucclla (larva), 943 



Gametes, 1 19 



Gammaridae, 842 



Gammarus, 843; limnaeus, 843 



Gases, dissolved in water, 36, distribution, 37. 

 solubility, 37 



Gasterostomata, 379 



Gasterostomous cercariae, 412 



Gasterostomum, 379 



Gastropoda, 970, 977: •^«*<' Mollusca 



Gastropodidac, 570, 603 



Gastropus, 603 ; hyptopus, 603, siylifer, 599, (>o.\ 



Gastrostyla, 289; steinii, 289 



Gastrotricha, fresh-water, 16, 621-631: dis- 

 tribution, 624, excretory organs, 623. key, 

 624-630, locomotion, 622, references, 631, 

 structure, 621 



Geminella. 163 



Genicularia, 135; spirolarnia, 135 



Geoplana nigrofusca, 360, slolli, 360 



Geoplanidae. 360 



Gerda, 292; sigmoiJes, 292 



Gerridae, 933 



Gigantorhynchus hirudinaceus, 542 



("lillia, 991: dltilis, 991 



Gill nets, 64 



Glass, water. 87 



Glaucoma, 280; sdntUlans, 2S0 



Glebula, 1017; rotundata, 1017 



Glenocercaria, 413 



