INDEX 



1099 



Leptoceridae, 936 



Leptodora, 739; kindlii, 739 



Leptodoridae, 739 



Leptomonas, 246 



Leptophlebia (imago), 919, (nymph), 921 



Leptorhynchus deniifer, 736 



Leptozosma, 135; cakmdata, 135 



Lepyrium, 994; showalkri, 994 



Lernaeidae, 7S4; see Copepoda 



Lemaeopodidae, 784; see Copepoda 



Lestes (imago), 923, (nymph), 891, 92S 



Leuceruthrus, 392, 407; micropteri, 392 



Leucochloridium, 409, 423 



Leucophrys, 27S; patula, 278 



Leucorhinia (imago), 927, (nymph), 932 



Leydigia, 721; acanthocercoides, 721, quadran- 

 gulariSj 721 



Libellula (imago), 927, (nymph), 931, 932 



Lieberkiihnia, 233; wageneri, 233 



Life, distribution of, 35; see Existence, con- 

 ditions of 



Life, Fresh-water; see Biology, Fresh-water 



Light, intensity of, 32, penetration in water of, 

 29, 30, vs. migration, 31 



Ligula, 431 



Ligulinae, 431 



Limnadia, 673; americana, 673, coriacea, 

 673 



Limnadiidae, 673 



Limnebius (adult), 939 



Limnesia, 870; histrionica, 870 



Limnesiopsis, 869; anomala, 869 



Limnetic region, 4 



Limnetidae, 672 



Limnetis, 672; brevifrons, 672, gouldii, 672, 

 gracilicornis, 672, mucronatus, 762 



Limnias, 615; ceratophyUi, 6is 



Limnicythere, 806; illinoisensis, 807, reticu- 

 lata, 806 



Limnocalanus macrurus, 774 



Limnochares, 859; aquaticus, 859 



Limnocharidae, 859 



Limnocnida, 322; indica, 322, rhodesia, 322, 

 tanganyicae, 322; see Hydrozoa 



Limnodrilus, 641; claparedianus, 641, gracilis, 

 641 



Limnology, i; lakes, 2, 4, 5, limnetic region, 

 4, littoral region, 4, ponds, 2, pools, 3, 

 shore zone, 3 



Limnomermis, 505 



Limnophilidae, 936, 937 



Limnoplankton, 6; see Plankton 



Lionotopsis, 275; anser, 275 



Lionotus, 276; wrzesniowskii, 276 



Lioplax, 988; subcarinata, g8& 



Liporhynchia, 340, 361 



Liriola, 980 



Lissoflagellata, 243 



Lithasia, 992; armigera, 992, geniculata, 992 



Littoral region, 4 



Littoridina, 990; monroensis, 990 



Lophophore, 947 



Lophopus cristallinus, 954 



Loricatina, 591 



Loxocephalus, 280; granulosus, 280 



Loxodes, 274; rostrum, 274 



Loxogenes, 400; arcanum, 400 



Loxophyllum, 275; rostratum, 275 



Lucius vermiculatus, 1031 



Lumbricillus, 642; rutilus, 642 



Lumbriculidae, 642 



Lumbriculus, 642; inconstans, 642 



Lutrochus (adult), 942 



Lycastoides alticola, 632 



Lychnothamnus, 174 



Lymnaea, 980; auricularia, 981, columella, 



981, haldemani, 981, megasoma, 980, obrussa, 



982, palustris, 981, stagnalis, 980, tUahensis. 

 981, s. s., 980 



Lymnaeidae, 980 



Lyngbya, 108; major, 108 



Lyngbyeae, 107 



Lyogyrinae, 991 



Lyogyrus, 991; pupoideus, 991 



Lysianassidae, 842 



Lythoglyphinae, 990 



Macrobdella, 656; decora, 656, sestertia. 656 



Macromia (imago), 925, (nymph), 930 



Macronychus (adult), 942 



Macrostominae, 338 



Macrostomum, 33S; appendiculatum, 338, 

 hystrix, 338, sensitimim, 339 



Macrothricidae, 708 



Macrothrix, 713; borysthenica, 715, elegans, 

 715, hirsuticornis, 714, laticornis, 714, mon- 

 tana, 714, rosea, 715, tenuicornis, 715 



Malacostraca (Higher Crustacea), 828-850; 

 cave species, 837, development, 832, habi- 

 tat, 83s, key, 841-850, method of study, 

 840, occurrence, 828, references, 850, struc- 

 ture, 830; see Crustacea 



Mallomonas, 260 



Mammals, aquatic, 1022-1024; references, 

 1066; see Vertebrata 



Man the modifying agent in fresh-water life, 

 II 



Manayunkia speciosa, 632 



Mancasellus, 841 



Margaritana, 995; margaritijera, 995 



Margaritanidae, 995 



Marionina Jorbcsae, 642 



Marl and marl lakes, aquatic plants factors 

 in formation of, 207 



Marshia, 780; albuquerquensis, 780, bremcau- 

 data, 780 



Mastax, 558, 560 



Mastigamoeba, 243; longifilum, 243 



Mastigophora (Flagellate Protozoa), Fresh- 

 water, 14, 238-270, 300; conjugation, 242, 



