no6 



INDEX 



Pseudomermis, 505 



Pseudoon, 1013 



Pseudophyllidea, 430; larvae of, 450 



Pseudo-pleurococcus, 153; vulgaris, 153 



Pseudopodia, 238 



Pseudosida, 692; bidentala, 692 



Pseudosuccinea, 981 



Pseudulvella americana, 171 



Psilonemateae, 107 



Psorophora (larva), 944 



Psychodidae (larvae), 945 



Psychomyiidae, 937 



Pterodina, 611; casca, 6n, patina, 611 



Pterodinidae, 611 



Pterodrilus, 644; alcicornus, 644, distichus, 



644 



Pteronarcys dorsata, 884 

 Pterosygna, 1005 

 Ptychobothriidae, 430 

 Ptychobranchus, 1012; phaseolus, 1012 

 Ptychopteridae (larvae), 944 

 Pulmonata, 977 

 Pump; plankton, 70, 78, clock, 80, Fordyce, 



79, thresher-tank, 80 



Purification of water containing algae, 1077 

 Pyralidae, 903 

 Pyramid dredge, 71 

 Pyrenoid, 116 



Pyrgulopsis, 990; nevadensis, 990 

 Pyxicola, 297; carleri, 297 

 Pyxidicula, 222; cymbalum, 222 

 Pyxidium, 293; ramosum, 293 



Quadrula, 995; cylindrica, 996, lachrymosa, 



997, plicala, 996, pustidosa, 997, undata, 997; 



s. s., 996 



Quadrulella, 226; symmetrica, 226 

 Qualitative methods of collecting, 72; see 



Methods of Collecting 

 Quantitative plankton net, 74 

 Quantitative study; of nannoplankton, 83; 



see Nannoplankton; of net plankton, 81; 



see Plankton 



Radiofilum, 163; flavescens, 163 



Radiosphaera, 156 



Radix, 981 



Radula, 973 



Ramosonema, 247; laxum, 247 



Ranatra, 934 



Rangia, 1020; cuneata, 1020 



Rangiidae, 1020 



Ranunculus aquatilis, 182, 183, 191, 193, 



201 



Raphidiophrys, 235; elegans, 235, viridis, 235 

 Rattenkonigcerearien, 414 

 Rattulidae, 568, 595 

 Rattulus, 595; cylindricus, 595, latus, 595, 



longiseta, 595 

 Redia, 371 



References on Fresh- Water Biology, 18-20; 

 Acanthocephala, 551-552, Algae, Blue- 

 Green (Cyanophyceae), 114, Algae, excl. of 

 Blue-Green, 177, Amphibia (Batrachia), 

 1066, Animalcules, 620, 955-956, Appa- 

 ratus and Methods, 88-89, Bacteria, 99, 

 Batrachia (Amphibia), 1066, Birds, 1066, 

 Bryozoa, 955~956, Cestoda, 452-453, 

 Cladocera, 739-74, Copepoda, 788-789, 

 Crustacea, Higher (Malacostraca), 850, 

 Cyanophyceae (Algae, Blue-Green), 114, 

 Existence, Conditions of, 60, Fishes, 1066, 

 Gastrotricha, 631, Gordiacea, 551-552, 

 Hirudinea, 660, Hydra, 322, Hydracarina, 

 875, Hydrozoa, 322, Infusoria, 300, Insecta, 

 946, Malacostraca, 850, Mammals, 1066, 

 Mastigophora, 300, Mollusca, 1020, Nema- 

 toda, Free-Living, 505, Nematoda, Para- 

 sitic, 551-552, Nemertina (Nemerteans), 

 458, Oligochaeta, 645, Ostracoda, 827, 

 Parasitic Worms, 452, 551, Plants, Higher 

 (Larger), 209, Phyllopoda, 675, Porifera, 

 315, Protozoa, 236-237, 300, Reptiles, 1066, 

 Rotatoria, 620, Sarcodina, 236-237, Trema- 

 toda, 452-453, Turbellaria, 364, Vegetation, 

 Larger (Higher), 209, Vertebrata, 1066; 

 see Investigators in Fresh-Water Biology; 

 Journals on Fresh- Water Biology 



Renette, 470 



Renifer, 405; ellipticus, 405, elongatus, 407, 

 megasorchis, 407, variabilis, 406 



Reniferinae, 405 



Reproduction, physiology of, 120; see also 

 the specific subjects 



Reptiles, Fresh- Water, 1026-1028; references 

 1066; see Vertebrata 



Reservoir sites, soil stripping of, 1074, pre- 

 vention of algae growths in, 1074 



Rhabditis, 493; cylindrica, 493 



Rhabdocoela, 333 



Rhabdocoelida, 333, 361 



Rhabdocoelous cercariae, 412 



Rhabdolaimus, 494; minor, 494 



Rhabdonema nigrovenosum, 521 



Rhabdostyla, 293; vernalis, 293 



Rhadinorhynchus, 550 



Rhantus (adult), 942 



Rheology, i ; evolution of stream, 5 



Rhinops, 599; vitrea, 565, 599 



Rhipidendron, 262; splendidum, 262 



Rhipidoglossa, 994 



Rhizoclonium, 166; hieroglyphicum, 166 



Rhizodrilus, 641; lacteus, 641 



Rhizomastigidae, 243 



Rhizopoda, 219 



Rhizosolenia, 127; eriensis, 127 



Rhizosoleniaceae, 127 



Rhodophyceae, 175-177; key, 175-177; see 

 Algae, Fresh-Water, excl. of Blue-Green 



Rhoicosphenia, 129; curvata, 129 



