logS 



INDEX 



Ilyocryptus, 712; acutifrons, 7i3» halyi, 713. 

 longiremis, 713, sordidiis, 712, spinifer, 713 



Ilyocypris, 809; bradyi, 810, gi6io, 809 



Ilyodrilus, 641 



Ilyodromus, 810; pedinatus, 810 



Incrustation on aquatic plants, 185; car- 

 bonate of lime, 187, gelatinous covering, 



187 



Ineffigiata, 149 



Infusoria (Ciliate Protozoa), Fresh- water, 14, 

 238-243, 271-300; cilia, 238, 239, ciliate 

 protozoa, 238, conjugation, 242, key, 

 271-300, methods of study, 242, physiolog- 

 ical processes, 241, references, 300, repro- 

 duction, 241, structure,. 239; see Protozoa 



Insecta, aquatic, 17, 876-946; adaptation to 

 water, 876, of larvae to aquatic life, 878 

 keys, 917-946; of adults, 934-935. 937-942 

 of imagos, 918-921, 922-927; of larvae, 

 917, 935-936, 943-946; of nymphs, 921-922, 

 928-932; recognition of characters, 880 

 references, 946, wing venation, 916; see 

 Coleoptera, Diptera, Ephemerida, Hemip- 

 tera, Lepidoptera, Neuroptera, Odonata, 

 Plecoptera, Trichoptera 



Intermediate host; see Host 



Investigators in Fresh- Water Biology, 1 1 



lo, 992; spinosa, 992 



Iota, 482; octangulare, 482 



Ironus, 486; americanns, 486 



Ischnura (imago), 924, (nymph), 929; verti- 

 calis, 893 



Isopoda, 829, 841; see Malacostraca 



Jaws (trophi) of rotatoria, 559 

 Jensenia, 348; pinguis, 348 

 Journals on Fresh- Water Biology, 20 



Kerona, 287; pediculus, 287 



Keys to Fresh- Water Biology; Algae, Blue- 

 Green (Cyanophyceae), 104-114, Algae, 

 excl. of Blue-Green, 125-177, Acanthoceph- 

 ala, 545-551, Animalcules, 587-619, 951- 

 955, Argulidae, 787-788, Bacillariaceae, 

 125-134, Bryozoa, 951-955, Chlorophyceae, 

 134-174, Cestoda, 429-451, Cladocera, 689- 

 739, Copepoda, 755-782, 784-786, 787-788, 

 Coleoptera, 937-943, Diptera, 943-946, 

 Ephemerida, 918-922, Ergasihdae, 784-786, 

 Gastrotricha, 624-630, Gnathostomata, 

 755-782, Gordiacea, 537-542, Hemiptera, 

 933-934, Hirudinea, 651-660, Hydra, 320- 

 322, Hydracarina, 859-874, Hydrozoa, 

 320-322, Infusoria, 271-300, Insecta, 917- 

 946, Mollusca, 977-1020, Malacostraca, 

 841-850, Mastigophora, 243-270, Nema- 

 toda, Free-Living, 482-505, Nematoda, 

 Parasitic, 520-535, Neuroptera, 934-936, 

 Odonata, 922-932, Oligochaeta, 638-644, 

 Ostracoda, 806-827, Phaeophyceae, 174- 



175, Porifera, 306-315, Protozoa, 219-236, 

 243-300, Phyllopoda, 666-675, Rhodo- 

 phyceae, 175-177, Rotatoria, 587-619, 

 Sarcodina, 219-236, Trichoptera, 936-937. 

 Trematoda, 374-424, Turbellaria, 333-364 



Kirchneriella, 151; obesa, 152 



Koenikea, 865; concava, 865 



Krendowskija, 863; ovata, 863 



Kurzia, 718; latissima, 718 



Labidestes siculus, 1036 

 Laccohius (adult), 939 

 Laccophilus (adult), 940 

 Lacinularia, 617; socialis, 561, 575, 617 

 Lacrymaria, 274; olor, 274 

 Ladona (imago), 927, (nymph), 932 

 Laevapex, 985 



Lagenophrys, 297; vaginocola, 297 

 Lagerheimia, 154; genevensis, 154 

 Lakes, 2, 4, 5; age series, 49, circulation of 

 water in, 27, conditions of existence in, 23, 

 in Lake Michigan, 35, epilimnion, 28, hypo- 

 limnion, 28, 38, thermocUne, 28, 38, waves 

 and their action, 28 

 Lamellibranchia, 970, 994; see Mollusca 



Lamprothamnus, 174 



LampsiUnae, 1007 



Lampsilis, 1009; ovata, loio, recta, loii, 

 texasensis, loii; s. s., loio 



Land planarians; see Turbellaria 



Lanthus (imago), 924, (nymph), 929 



Lanx, 986; newberryi, 986 



Lara (adult), 942 



Lasmigona, 1005 



Lastena, 1002; lata, 1002 



Lateriporus, 444 



Lathonura, 716; rectirostris, 716 



Latona, 689 ; parviremis, 690, setifera, 690 



Latonopsis, 691; fasciculata, 692; occiden- 

 talis, 691 



Lebertia, 867; dubia, 867, tau-insignita, 867 



Lebertiinae, 867 



Lechriorchis, 407; elongatus, 407, primus, 407 



Lecithophora, 340, 361 



Lecquereusia, 222; epistomium, 223, modesta, 

 222, spiralis, 223 



Leeches; see Hurudinea 



Lemanea, 175; lorulosa, 175 



Lembadion, 281: bullinum, 281 



Lemna, 178; minor, 192 



Lemnisci, 543 



Lepidoderma, 625; concinnum, 626, rhom- 

 boides, 625, squamatum, 625 



Lepidoptera (moths), 903, 917; see Insecta 



Lepidurus, 671; bilobatus, 671, couesii, 671, 

 glacialis, 671, lemmoni, 671 



Lepocinclis, 253 



Lepodermatidae, 402 



Lepomis megalotis, 103 1 



Leptidae (larvae), 946 



