INDEX. 



763 



Nuclei, Hoffmann's, in Spinal Cord of 



Chick, 539 

 Nucleolus, Nature and Function, 505 

 Nucleus, Influence on Growth of Cell, 60 

 Nudibranchs, Pigments, 38 

 Nuphar luteum, Cork-formation in Interior 



of Leaf-stalk, 448 

 Nusbaum, J., Regeneration in Enchy- 



trpeidse, 433 

 Nussbaum, M., Cell-divisions and Mitosis, 



160 

 Nutrition of Seed Plants. See Contents, 



xxiii 

 Nuttall, G. H. F., Biological Test for 



Blood, 543 

 Nymphsea and Castalia, Development of 



Embryo-sac and Embryo, 449 



O. 



Oak, Canker, 338 

 Objective-carriers, Albrecht's, 237 

 Objective, Leitz', Spherically, Chromati- 

 cally, and Astigmatically corrected, 

 360 " 



— Zeiss' A*, 614 



Objectives, Assorted Pairs, for Binocular 

 Microscopes, 614 



— First English Achromatic, 16 

 — . See Contents, xxxiv 



— when used as Condensers, Zeiss' Cen- 



tring Apparatus, 615 



— Zeiss', 487 



O'Brien, A., Resistance to Temperature of 



Fungi, 471 

 Ochnacese, Study of the Family, 318 

 Oculars for General Laboratory Work, 487 

 Odhner, T., New Distomids, 558 



— New Trematodes from Crocodile, 308 

 Odoriferous Organ of the Male Hepialus 



hectus, 302 

 GMogonia, with Semicircular Foot-cell, 



210 

 OZdogonium, 582 



GSgopsid, Cephalopods, Synopsis, 299 

 Oil in Vaucheria, 83 

 Oka, A., Vascular System of Hirudinea, 



556 

 Okamura, K., Japanese Marine Algse, 679 

 Okapia johnstoni, 172 

 Okedenia, 81 

 Olfactory Organ in Vertebrates, 164 



of Ammoccetes, Development, 29 



Oligochseta, Chloragogen, 648 



— Swiss, Observations, 048 

 Oligochsete, Commensal, in New England, 



49 

 Olive, E. W., The Acrasiese, 462 

 Olivier, M. H, Lichens of the Pyrene'es- 



Orientales, 468 

 Omelianski,V., Fermentation of Cellulose, 



597 



Omeliansbi, W., Cultivation of Nitrite- 

 formers on Paper Disks, 618 



— Simple Apparatus for Cultivating Anae- 



robes in Test-tubes, 497 

 Oncjuekoa and Strombosia, Germination , 



322 

 Oniscus asellus, Spermatogenesis, 47 

 Onvchophora, Oviparous Species, 306 



— Papillae, 306 



Oogenesis and Spermatogenesis in LHlio- 

 bius forficatus, 304 



— Early Stages in, and the Synaptic 



Phases, 537 



— in Hydrophilus piceus, 643 

 Oophyte and Sporango of Selaginella, 76 

 Oosphere, Development and Fertilisation 



in Pinus strobus, 70 

 Ophidia, Branchial Clefts, 539 

 Ophioglossum and Helminthostachys, Pro- 

 thalli, 327 



— Helminthostachys, and Psilotum, Pro- 



thallus of, 77 

 Ophthalmometer, Chambers and Inskeep's 



Improved, 709 

 Opisthobranchs, " Talisman," 427 

 Oppenlieimer, A., Sense-Organs of Poly- 



chaet Proboscis, 647 

 Optics, Microscopical. See Contents, xxxv 

 Opto-Technics, 495 

 Oranges, Black Rot, 596 

 Orchids, Malformations of the Flower, 577 

 Ord, William Miller, the late, 417 

 Organism, Yeast-eating Amoeboid, 562 

 Organisms, Statistical Study, 171 

 Organs of Plants, Floating, 66 

 Orientation Plate, Born and Peter's, 621 

 Orthonectids, Free Phase in Life-Cycle, 53 

 Orthoptera, Index to North American, 428 



— Spermatocytic Kineses, 43 

 Orthostigmats, Beck-Steinheil, 360 

 Osawa, G., Anatomy of Giant Salamander 



of Japan, 637 

 Osborn, H., Interesting Case of Miinicrv, 



642 

 Osborn, H. L., Axolotl and Amblystoma, 

 34 



— Staining Axis-Cylinders of Fresh Spinal 



Cord, 715 

 Oscillaria prolifica, 341 

 Osmotic Pressure, Influence on Form and 



Structure of Plants, 76 

 Ostenfeld, C. H., Phyto-plankton of the 



Caspian Sea, 676 

 Ott, E., Chromatophores of Fresh-water 



Diatoms, 80 

 Otto, R., Changes during Ripening Apples, 



457 

 Oudemaus, A. O, Hibernating Cyst of a 



Mite, 431 

 Oudemans, C. A. J. A., Fungi of the 



Netherlands, 340 

 Ova of Birds, Pseudo-chromosomes, 632 



— of Roe Deer, Albuminoid Crystals, 632 



