722 
INDEX. 
Weiss, F. E., What is Life ? 475 
Weiss, 0., Skin-Glands of Toad, 152 
Weisse, A., Flower of Onagracese, 615 
Weleminsky, F., Spore-formation in De- 
mcitium pullulans, 520 
Went, F. A. F. 0., Periodicity in the 
Flowering of Dendrobium crumenatum, 
501 
Wermel, M. B., Combined Fixing and 
Staining Method, 452 
Werner, C., Formation of Conids in Fungi, 
420 
West, G. S., Variation in Desmids, 629 
West, G. T., Table-Stage, 355, 440 
West, W. and G. S., Stipitococcus, a New 
Genus of Protococcacese, 67 
Westermaier, M., Stomates and their Sub- 
sidiary Apparatus, 617 
Wet Rot in Potato, 69 
Wettstein, R. v., Change of a Perennial 
into an Annual Plant, 52 
— Protection of Geophilous Flowers, 172 I 
Wettsteinia, a New Genus of Hepaticse, j 
512 
Wheeler, W. M., Instinct and Tropism in j 
Insects, 592 
— Life-History of Dicyema, 396 
— Sexual Phases of Myzostoma, 491 
Whip-Snakes, 26 
White Corpuscles, Staining Granules in, 
347 
Whitting, Frances, New Peridiniacem from 
the Atlantic, 496 
Widal’s Reaction with a Measured Quan- 
tity of Blood, 672 
Wiegand, K. M., Embryo-sac .of Mono- 
cotyledons, 504 
Wieland, G. R., Male Flower of Cyca- 
deoidea, 302 
Wieler, A., Pneumathodes and Aeren- 
chyme, 171 
Wieler, J., Periodicity in the Growth in 
the Thickness of Trees, 52 
Wiesner, J., Adaptation of Leaves to the 
Intensity of Light, 299 
— False Dichotomy, 503 
— Heliotropism caused by Diffused Day- 
light, 54 
Wijhe, Van, — ., Share of the Ectoderm in 
Forming the Pronephric Duct, 18 
Wilcox, E. M., Convenient Washing Ap- 
paratus, 553 
Wildeman, E. de, Regeneration in Algte, 
418 
Will, H., Vitality of Dried Yeast, 520 
Will, Ludwig, Development of Ringed 
Snake, 266 
Willcox, M. A., Anatomy of A cm sea fragilis, 
275 
Willey, A., Some Points in the Morpho- 
logy of Enteropneusta, 161 
— Embryonic Membranes of Insects, 276 
— What is “ Anlage ” ? 17 
Williams, H. S., Variation versus Heredity, 
274 
Williams, J. Lb, Fucus Hybrids, 514 
Life-History and Cytology of the Fuca- 
cese, 418 
— Reproduction of Dietyota, 307 
Wilson, E. H., Incubator for Maintaining 
Constant Low Temperatures, 350 
Wilson, J. H., Germination of Crinum 
Macoivani, 621 
Wings of Insects, 31, 155, 482 
Winkler, H., Formation of Starch in Chro- 
matophores, 181 
Winkler, W., Nature of Bacteria and their 
Position among Fungi, 634 
Winter Egg of Leydigia acantliocercoides 
Fisher, 485 
Winter-Plankton in Large and Small 
Basins, 153 
Wisselingh, C. vaD, Nucleole and Karyo- 
kinesis in Spirogyra, 186 
Wlassak, R., Origin of Myelin, 152 
Wolcott, R. H., North American Species 
of A tax, 597 
Wolf, K., Pigment-formation of Fluoresc- 
ing Bacteria, 522 
Wolfer, T., Assimilation of Nitrates by 
Plants, 300 
Wolff, A., Cuticular Structure, 22 
Wolff, Elise, Three Staining and Mount- 
ing Methods, 234 
Wolffhiigel, K., Cestodes of Birds, 396 
Woodworth, W. McM., New Pelagic Ne- 
mertean, 602 
Woroninella g. n., 516 
Wright, Lewis, Improved Projection Micro- 
scope, 247 
Wulff, Th., Stopped Stomates, 175 
Wyss, O., Fish Disease caused by Bac- 
terium vulgar e, 70 
X. 
Xenia, Structure, 605 
Xylariodiscus g. n., 516 
Xylose, Necessity of, to Denitrifying Bac- 
teria, 198 
Y. 
Yeast, Alcohol-producing Enzyme of, 313 
— Parasitism and Sorghum Blight, 313 
— Vitality of Dried, 520 
Yeast-Plant, Nucleus, 312 
Yeasts, Biology, 65 
— Wine-, Natural Dissemination, 190 
Yellow Fever, iEtiology, 639 
Yokote, T., Preparation of Nutrient Agar, 
342 
Yolk -elements, Relation to Blastoderm- 
Cells, 470 
