INDEX. 
867 
Y. 
Yeast, Brewer’s, Influence of Tartaric Acid 
on, 76 
-cell, Nucleus of, 765 
, and Spores of, 220 
, in, 366 
cells, Granules and Vacuoles, 510 
, Structure of, 509 
, Chinese, and Amylomyces Bouxii , 
681 
Forms, Hansen’s Criticism of Oidium 
and, 221 
, Influence on Smell of Wine, 76 
, Preparing and Staining, 118 
, Different Wine-, Influence on 
Character of Wine, 75 
, Discriminating and Photographing, 
75 
, Fermentation Differences of Wine, 
510 
Yeasts, Growing on Solid Media, 797 
Yolk-cells and Yolk Segmentation, 154 
membrane in Echinoderm Ova, 192 
nucleus and Centrosome, 603 
Youdale, W. H., 423, 573 
Young, G. B., New Apparatus for Counting 
Bacterial Colonies in Roll-Cultures, 797 
Yphthima, Male Genitalia of, 321 
Yucca , Pollination of, 209 
Yung, E., Influence of Light on Develop- 
ment of Animals, 311 
Z. 
Zacharias, E., Chemical Nature and 
Chromatophily of Protoplasm, 805 
, O., Distoma Cysts in Heart of Fish, 
333 
, Infusorian Skin Parasite of Fresh- 
water Fishes, 196, 340 
Zacharias, O., New Freshwater Rotifers, 481 
Zeiss, C., Apparatus for the Projection of 
Microscopic Images, 692 
Zentmayer, The late Joseph, 793 
Zimmermann, A., Mechanics of Growth of 
the Cell-wall, 751 
, — ., Golgi’s Method and the Distri- 
bution of Nerve-fibres, 27 
Zoebl, A., Brown and Grey Barley, 223 
Zorkendorfer, — ., Species of Bacteria 
found in Fowls’ Eggs, with suggestions 
for a Rational Method of Preserving 
Eggs, 687 
Zograf, N., Ectodermic Tissues of Cestoda, 
333 
, Origin and Relationships of Arthro- 
poda, 319 
Zoja, R., new Hydroid, 491 
Zollikofer, R., Capitate Hairs with Vi- 
bratile Filaments, 501 
Zonites cellarius, Integument of, 617 
Zoospores, Production of, 72 
Zopf, W., Bacterium vernicosum, 682 
— — , Contributions to Physiology and 
Morphology of Lower Organisms, 779 
, Labyrinthulese, 513 
, New Lichen-acid, 497 
, Pigments of Lower Cryptogams, 496 
, Sphierotilus roseus , a new red aquatic 
Schizomycete, 518 
Zschokke, F., Life-history of Echino - 
rhynchus proteus, 741 
, Rare Parasites of Man, 46 
Zukal, H., Hymenobolus, a new Genus of 
Myxomycetes, 671 
Zumft, — ., Putrefactive Processes in large 
Intestine, and Micro-organisms which 
induce it, 377 
Zykoff', W., Development of Epliydatia 
from Gemmules, 339 
. Turbellarian Fauna of Moscow, 190 
3 o 
1893. 
LONDON : PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, 
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