INDEX. 



1131 



Ynlk in Osseous Fislics, Significance of, 



730. 

 , Relation of, to Blastoderm in Tele- 



ostean Fish-ova, 43. 

 Yolk-sac, Wall of, and Paiablast of tlie 



Lizard, 564. 

 Yucca, Fertilization of, 116. 



Z. 



Zacharias, E., Structure of the Nucleus, 



771. 

 , O., Chemical Comparison of Male 



and Female Elements, 45. 

 , Pelagic and Littoral Fauna of 



North German Lakes, 733. 

 , Process of Fertilization in Ascaris 



mcgaloceijhala. 593. 

 Zalewski, A., Spore-formation in Yeast, 



132. 

 Ziislein, T., S34. 

 Zanniehellia polyearpa and Rnppia rostel- 



lata, Tubercles on, produced by Tetra- 



myxa parasitica, 793. 

 Zatti, C, Amyloid Corpuscles in Pollen- 

 grains, 991. 

 Zea Mays, Vascular Bundles of, 109. 

 Zech, P., 492, 667. 

 Zeiller, R., Ulodendron and Bothroden- 



dron, 121. 

 Zeiss's (C.) Objective-changer, with slide 



and centering adjustment, 646. 



Zeiss's (C.) Ten Thousandth Jlicroscope, 



162. 

 Zidiiika, C, Studies on Rotatoria, 243. 

 Zipperer, P., Pitchers of Sarracenia, 



612. 

 Zittel, K. A. v., and J. V. Rohon, Cono- 



donts, 400. 

 Zoospores in Saprolegniese, Formation and 



Liberation of, 444. 

 Zoothamnium arbuscula, 253. 

 Zopf, W., Ancylistefe and Chytridiaceoe, 



2S3, 630. 



, Double Lichen, 1001. 



, Tannin-receptacles in the Fumaria- 



ceffi, 427. 

 Zschokke, F., Helminthological Observa- 

 tions, 757. 



, Scolex polymorphus, 93. 



Zukal, H., Green colour of decaying wood, 



631. 



• , New Genus of Ascoraycetcs, 630. 



, Receptacles for reserve-materials in 



Lichens, 279. 

 Zune, 696. 

 Zwaardemaker, H., Mitosis Staining, 



1056. 

 Zygomorphic Flowers, Normal Position 



of, 612. 



, Origin of, 780. 



Zygomorphy of Flowers, 266, 779. 

 Zygospores of Mucorini, Membrane of, 



281. 



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