Achlya (35)--473
    collections named by genus only (35)--564
    excluded taxa (35)--568
    imperfectly known species (35)--565
    key to species (35) --475
    species of (35)--481 et sqq.
        abortiva (35)--548
        abortiva f. normalis (35)--568
        achlyoides (35)--547
        ambisexualis (35)--560
        americana (35)--537
        androgyna (35)--507
        apiculata (35)--504
        apiculata var. forbesiana (35)--569
        aquatica (35)--565
        benekei (35)--569
        bisexualis (35)--561
        bonariensis (35)--497
        californica (35)--569
        cambrica (35)--535
        caroliniana (35)--520
        colorata (35)--486
        contorta (35)--569
        cornuta (35)--569
        crenulata (35)--550
        debaryana (35)--527
        diffusa (35)--516
        dioica (35)--570
        dubia (35)--513
        dubia var. pigmenta (35)--570
        ferax (35)--571
        glomerata (35)--549
        Hähneliana (35)--571
        heteromorpha (35)--571
        heterosexualis (35)--558
        hoferi (35)--567
        hypogyna (35)-571
        inflata (35)--518
        intermedia (35)--571
        intricata (35)--517
        irregularis (35)--525
        kamatti (35)--572
        leucosperma (35)--572
        lobata (35)--553
        megasperma (35)--496
        nowickii (35)--572
        oblongata var. gigantica (35)--493
        oblongata var. oblontgata (35)--490
        oidiifera (35)--573
        oligacantha (35)--494
        orion (35)--523
        ornata (35)--512
        oviparvula (35)--519
        pacif ica (35)--573
        Palaeachlya perforans (35)--575
        papillosa (35)--489
        paradoxa (35)--573
        penetrans (35)--573
        pinnulata (35)--567
        polyandra (35)--498
        primoachlya (35)--554
        prolifera (35)--541
        prolifera Pringsheim (35)--573
        proliferoides (35)--545
        pseudoachlyoides (35)--522
        racemosa (35)--500
        radiosa (35)--481
        recurva (35)--556
        Reed 478 (35)--575
        regularis (35)--574
        rodrigueziana (35)--540
        stellata (35)--484
        sp. Kobayasi and Konno (35)--574
        sp. Schlösser (35)--574
        sp. Viégas and Teixeira (35)—574
        subtenanea (35)--484
        subtenanea (35)--552
        variabilis (35)--574
Animal associations and watermolds (30)--444
    Cladocerans (30)--446
    copepods (30)--448
    isopod (30)--448
    miscellaneous (30)--450
    mosquito larvae (30)--444
    nematodes and midges (30)--449
    shrimp larvae (30)--447
Antheridia, morpholory of (9)--143
Antheridiol, see (21)--299
Aphanodictyon (48)--786
    papillatum (48)--787
Aphanomyces (4l)--676
    collections named by genus only (4l)--719
    excluded taxa (41)--727
    imperfectly known species (41)--720
    key to species (41)--678
    species of (41)--681 et sqq.
        acinetophagus (41)--688
        aculeatus (41)--727
        americanus (41)--727
        amphigynus (41)--705
        apophysii (41)--720
        astaci (41)--722
        bosminae (41)--689
        camiptostylus (41)--699
        cladogamus (41)--703
        cochlioides (41)--696
        daphniae (41)--689
        euteiches (41)--692
        exoparasiticus (41)--717
        gordejevi (41)--727
        hydatinae (41)--723
        keratinophilus (41)--686
        laevis (41)--681
        norvegicus (41)--713
        ovidestruens (41)--728
        parasiticus (41)--718
        patersonii (41)--691
        phycophilus (41)--724
        pisci (41)--726
        polysporis (41)--729
        raphani (41)--701
        scaber (41)--708
        sp. (41)--719, 730
        sp. Barthelmes (41)--729
        sparrowii (41)--715
        stellatus (41)--711
        volgensis (41)--706
Aphanomycosis (29)—431
Aplanopsis (34)--469
    spinosa (34)--472
    terrestris (34)--469
Appendix (50)--797
Aquatic axenic cultures (2)--25
Asexual reproduction, physiology of (19)--264
    gemmae (19)--281
    light (19)—270
    non-nutrient factors (19)--269
    pH (19)--270
    planonts (19)—271
        chemical constituents (19)—271
        effect of pH (19)—277
        nutritional and chemical constituents of media (19)--264
        sporangium (19)--264
        spore germination (19)--273
        temperature (19)—269
        temperature and light effects (19)—276
        water quantity quality, and oxygen tension (19)--278