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. 



Adineta, 619; vaga, 619 



Aeolosoma, 638; hemprichi, 638, ienebrarum, 



638 

 Aeolosomatidae, 638 

 Aerobes, obligatory; see 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; capsularia, 521, papil- 



ligerum, 521, piscium, 521 

 Age series of ponds, 49 

 Aliinete, 118 



Alaimus, 499; simplex, 499 

 Alasmidonta, 1005; arcula, 1007, calceola, 



1006, marginata, 1006, undulata, 1006 

 Alasmidonta s. s., 1006 

 Albertia, 589; intrusor, 589 

 Albia, 867; slalionis, 867 

 Alexia, 978; seiifer, 978 



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

 tion of growths, 1074, purification of water 

 containing, 1077; see Algae, Blue-Green; 

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

 Algae, Blue-Green (Cyanophyceae), Fresh- 

 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 Algae; Algae, 

 Fresh-Water, excl. of Blue-Green 

 Algae, Fresh-Water, excl. of Blue-Green, 115- 

 177; abundance, 121, akinete, n8, an- 

 theridium, 119, antherozoid, 119, aplano- 

 spores, 118, centric forms, 126, chromato- 

 phores, ii5, 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, oospore, 

 119, palmella condition, 115, phycocyanin, 



Abedus, 933 



Abothrium, 431; crassum, 431 



Acanthiidae, 933 



Acanthocephala, i5, 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; ratios, 547 



Acanthochasmidae, 391 



Acanlhochasmus coronarium, 391 



Acanthocirrus, 445 



Acanthocystis, 236; chaetophora, 236 



Acantholeberis, 710; curmrosiris, 710 



AceUa, 981 



Acetabula, 425 



Achnanthaceae, 130 



Achnanthes, 130; exilis, 130 



Achroraadora, 490; minima, 490 



Acilius, 941 



Acineta, 300; fluviatilis, 300 



Acinetactis, 244; miraUlis, 244 



Acmostomum cremdatum, 361, 364 



Acoleidae, 447 



Acoleus, 447; armalus, 447 



Acrobeles, 495 



Acrodactyla, 396 



Acrohchanus, 396; lintoni, 396, pelalosa, 396 



Acroloxus, 985 



Acroperus, 718, angusialus, 719, harpae, 7 



Actinastrum, 159; hanlzsohii, 159 



Actinobdella, 655; annectens, 655, inequian- 

 nulata, 655 



Actinobolus, 271; radians, its. 



Actinolaimus, 485; radiatus, 485 



Actinolophus, 234; minulus, 234 



Actinomonas, 243; vernalis, 243 



Actinophrys, 234; sol, 217, 234 



Actinopoda, 234 



Actinosphaerium, 234; eichhornii, 213, 234 



Acuaria, 526; ardeae, 527, Iriaenucha, 526 



Acuariinae, 526 



Acyclus, 611; inquietus, 611 



Adaptations of aquatic animals, 1022 



19 



io8s 



