INDEX 



1087 



\ploparaksis, 443; filum, 443 



Apocrangonyx, 843 



Apodina, 630 



Apparatus and Methods, 61 ; references, 88, 89 



Apsilidae, 611 



Apsilus, 611; bucinedax, 611 



Aptogonum, 137; baUeyi, 137 



Apus, 671; aequalis, 663, 671, longicaudatus, 



672, lucasanus, 672, newberryi, 671 

 Aquatic animals, birds, earthworms, etc.; 



see Animals, Birds, Earthworms, etc., 



aquatic 

 Arachnida, 17 

 Arcella, 221; dentata, 222, discoides, 222, 



aid gar is, 222 

 Arcellidae, 220 

 Archer inia boltoni, 144 

 Archigetes, 430 



Archilestes (imago), 923, (nymph), 928 

 Arcidens, 1003; confragosa, 1003 

 Argia (imago)', 923, (nymph), 928 

 Argulidae, 786-788; key, 787, 788; see Cope- 



poda; Siphonostomata 

 Argulus, 787; americanus, 787, appendiculo- 



sus, 787, catostomi, 787, ingens, 788, lepido- 



stei, 788, macidosus, 787, stizostethi, 788, 



versicolor, 787, 788 

 Arhythmorhynchus, 550; brevis, 550, pumili- 



rostris, 551, trichocephalus, 550, undnatus, 



550 



Arkansia, 1004; wheeleri, 1004 

 Armiger, 984 

 Arrhenurinae, 863 

 Arrhenurus, 863; albator, &6s,forpicaius, 863, 



globator, 863, maculator, 863 

 Artemia salina, 668 

 Arthrodesmus, 141; convergent, 141 

 Arthropoda, 17 

 Arthrospira, 108; jenneri, 108 

 Ascaridae, 531 

 Ascaris, 531; ardeae, 532, cylindrica, 531, 



entomelas, 531, helicina, 532, lanceolata, 531, 



Jowga, 531, lumbricoides, 512, microcephala, 



532, mucronata, 53 2 ; nigrovenosa, 531, 



penita, 531, serpentulus, 532, sulcata, 531, 



tenuicollis, 531 

 Ascaroidea, 531 

 Ascoglena, 252 



Ascomorpha, 607; ecaudis, 607 

 Asellidae, 841 



Asellus,^4i; communis, 841 

 Aspidisca, 291; costata, 291 

 Aspidobranchia, 994 

 Aspidocotylea, 379 

 Aspidogaster, 380; conchicola, 380 

 Aspidogastridae, 379 

 Asplanchna, 607; herrickii, 582, 607, priodonta, 



607 



Asplanchnidae, 571, 607 

 Asplanchnina, 607 



Asplanchnopus, 607; myrmeleo, 607 



Assimenia, 986; calif ornica, 986 



Assimeniidae, 986 



Association, coefficient of, 54 



Assulina, 230; minor, 230, seminidum, 230 



Astacus, 846 



Astasia, 254; trichophora, 254 



Astasidae, 253 



Asterionella, 133; gracillima, 133 



Asteromeyenia, 311; plumosa, 312, radio- 



spiculata, 312 



Asymphylodora, larva of, 423 

 Atractides, 874; spinipes, 874 

 Atractonema, 254; tortuosa, 254 

 Atrochus, 611; tentaculalus , 611 

 Aturinae, 864 



Aturus, 866; mirabilis, 866, scaber, 866 

 Atyidae, 845 



Aulophorus, 639; furcatus, 639, wagMJ, 639 

 Auricula, 978; pellucens, 978 

 Auriculidae, 977 

 Auriculinae, 977 



Auridistomum, 397; chelydrae, 397 

 Auxospores, 125 



Awerinzewia, 227; cydostomata. 227 

 Axonopsis, 866; complanata, 866 

 Azygia, 392; /'', 392, sebago, 371, tereticolle, 



392 

 Azygiidae, 392 



Bacillariaceae (diatoms), 125-134; key, 125- 

 134; see Algae, Fresh-Water, excl. of Blue- 

 Green 



Bacteria, 13, 90-99; aerobes, obligatory, 93, 

 anaerobes, facultative and obligatory, 93, 

 94, bacillus coli as index of contamination, 

 1069, classification, 90, forms, 91, metachro- 

 matic granules, 92, microorganism, 94, 

 movement, 92, number, 94, in natural 

 waters, 96, 1070, references, 99, spores, 92, 

 structure, 91 



Baetis (imago), 921, (nymph), 922 



Baetisca (imago), 919, (nymph), 921 



Bailey a, 176 



Balladina, 288 



Bangia, 177; atro-purpurea, 177 



Bartonius, 849 



Basiaeschna (imago), 925, (nymph), 930 



Bastiana, 497; exilis, 497 



Bathymermis, 505 



Batrachia (Amphibia), 1028, 1029; refer- 

 ences, 1066; see Vertebrata, aquatic 



Batrachospermum, 176; grabussoniense, 176 



Bdellodrilus, 644; illuminalus, 644, insla- 

 bilis, 644, philadelphicus , 644, pulcherrimus, 

 644 



Bdelloida, 576, 619 



Beetles, aquatic; see Coleoptera; Insecta 



Belostoma, 934 



Belostomatidae, 933 



