INDEX 



All technical terms and all scientific names are included, but only major references to 

 each are given. Important cross references are grouped together after other entries under a 

 given term. All figures refer to text pages. 



Specific names are printed in italics and follow in alphabetic order the name of the genus 

 to which the species belong; the generic name is printed in italics only when it occurs exclu- 

 sively in a binomial combination and no reference is made to the genus alone. 



Abedus, 933 



Abothrium, 431; crassum, 431 



Acanthiidae, 933 



Acanthocephala, 16, 365, 416, 506-510, 542- 

 551; key, 545-551; lemnisci, 543, life 

 history, 544, proboscis, 542, p.- sheath, 

 543, references, 552; see Gordiacea; Nema- 

 toda (Parasitic); Parasitic Roundworms 



Acanthocephalus, 547; ranae, 547 



Acanthochasmidae, 391 



Acanthochasmus coronarium, 391 



Acanthocirrus, 445 



Acanthocystis, 236; chaetophora, 236 



Acantholeberis, 710; curvirostris, 710 



Acella, 981 



Ace tabula, 425 



Achnanthaceae, 130 



Achnanthes, 130; exilis, 130 



Achromadora, 490; minima, 490 



Acilius, 941 



Acineta, 300; fluviatilis, 300 



Acinetactis, 244; mirabilis, 244 



Acmostomum crenulatum, 361, 364 



Acoleidae, 447 



Acoleus, 447; armatus, 447 



Acrobeles, 495 



Acrodactyla, 396 



Acrolichanus, 396; lintoni, 396, petdosa, 396 



Acroloxus, 98s 



Acroperus, 718, angustatus, 719, harpae, 719 



Actinastrum, 159; hantzschii, 159 



Actinobdella, 655; annectens, 655, inequian- 

 nulata, 655 



Actinobolus, 271; radians, 271 



Actinolaimus, 485; radiatus, 485 



Actinolophus, 234; minutus, 234 



Actinomonas, 243; vernalis, 243 



Actinophrys, 234; sol, 217, 234 



Actinopoda, 234 



Actinosphaerium, 234; eichhornii, 213, 234 



Acuaria, 526; ardeae, 527, triaenucha, 526 



Acuariinae, 526 



Acyclus, 611; inquietus, 611 



Adaptations of aquatic animals, 1022 



Adineta, 619; vaga, 619 



Aeolosoma, 638; hcmprichi, 638, Unebrarum, 

 638 



Aeolosomatidae, 638 



Aerobes, obligatory; sec Bacteria 



Aeronemum, 164; polymorphum, 164 



Aeschna (imago), 925, (nymph), 930 



Agabetes (adult), 942 



Agabus (adult), 941 



Agamodistomum, 411; apodis, 411 



Agamodistomum stage of Cercaria rubra, 420 



Agamomermis, 520 



Agamonema, 520; capsiilaria, 521, pap'd- 

 ligerum, 521, piscium, 521 



Age series of ponds, 49 



Akinete, 118 



Alaimus, 499; simplex, 499 



Alasmidonta, 1005; areola, 1007, caJceola, 

 1006, marginala, 1006, undiilata, ioo<i 



Alasmidonta s. s., 1006 



Albertia, 589; intrusor, 5S9 



Albia, 867; stationis, S67 



Alexia, 978; selifer, 978 , 



Algae, 13; methods of killing. 1076, preven- 

 tion of growths, 1074, purification of water 

 containing, 1077; see .\lgae, Blue-Cirecn; 

 Algae, Fresh-Water, excl. of Bluc-(irecn 



Algae, Blue-Green (Cyanophyceae). Frcsh- 

 Water, 100-114; color, 102, cyanophycin 

 granules, 102, heterocysts, 103. key, 104- 

 114, phycocyanin, 102, 117, references, 114, 

 thermal springs, life of, loi, vacuoles. 103, 

 "water-bloom," 114; see .Mgae; .Mgac. 

 Fresh-Water, excl. of Blue-Green 



Algae, Fresh-Water, excl. of BIue-Grccn. 115- 

 177; abundance, 121, akinete, 118. an- 

 theridium, iiy, antherozoid, 119. aplano- 

 spores, 118, centric forms, 12^, i hromato- 

 phores, 116. cultures, 123, and mediums of, 

 124, diatomin. 117, disc-shaped chroma- 

 tophores, 116. filamentous, 121. forms, 115, 

 gametes, 119, key, 125-177. life history, 122, 

 occurrence, 122, oogonium, 119. o»isporc, 

 119, palmella condition, 115, phycocyanin, 



108 = 



