INDEX. 



1113 



Nyctaginese, Calcium oxalate in the Cell- 

 wall of, 607. 



NymphseacetB, Algae epiphytic on, 124. 



, Terminal Growth of tlie Eoot in, 



271. 



O. 



Object-glasses, 296. 



Object-holder, Keichert's, Modification of, 

 846. 



Object-points, Determining the Reciprocal 

 Positions of, 171. 



Objective, A new, 809. 



, Diminishing the power of, 647. 



, New Glycerin Immersion, 645. 



Objective-changer, Zeiss's, with slide and 

 centering adjustment, 646. 



Objectives, 1023. 



and Oculars, Paper for Cleaning the 



Lenses of, 296. 



, Apochromatic, 462. 



, Double, with a common field of 



view, 462. 



, Jaubert's (L.), 632. 



, Method of Intensifying the Eesolv- 



ing Power of Microscope, 1033. 



, New Apochromatic, 160. 



, New Optical Substance for, 1023. 



, Thickness of cover-glass for which 



unadjustable, are corrected, 1022. 



Obrzut, A., Giant Cells of Tubercle, 

 566. 



Ochrea of Polygonacese, 430. 



Oculars and Objectives, Paper for Clean- 

 ing the Lenses of, 296. 



Oerley, L., Criodrilus lacuum, 591. 



• , New Species of Mites, 390. 



O'Hara, R., " Means of Movement pos- 

 sessed by the Diatomacete, 697. 



, Motion of Diatoms, 1070. 



Ohrdruf, T. v., Galls on the Leaf of the 

 Vine, 384. 



Oidium albicans, 793. 



Oil, Epidermal Glands containing an 

 Ethereal, 430. 



" Old and New Microscopical Instru- 

 ments," 814. 



Oligochaeta, Budding in, 91. 



Olive, Tuberculosis of, 286. 



Oliver, F. W., Conduction of Irritation in 

 irritable stigmas, 780. 



, Pollination of Plem'othallis ornatus, 



992. 



Oltmanns, P., Chsetomium, 791. 



• •, Cultivation of Chsetomium, 1041. 



Onion, Vesicular Vessels of, 262. 



Ontogeny and Phylogeny of the Polyzoa, 

 66. 



Oogenesis in Ascaris, 92. 



of Chiton, 940. 



of Insects, 70. 



Oospores, Propagation of Peronospora viti- 

 cola by means of, 789. 



Opahna, New, 105. 



Opaque Illuminator, Hilger's, 462. 



Objects, Mountmg, 523, 692. 



Opaque Objects, Mounting, on a Micro- 

 meter Background, 692. 

 Opljeliacese, Nervous System of, 957. 

 Ophiurids, Circulatory Apparatus of, 761. 



, Mergui. 598. 



Opisthobranchs and Annelids, Pericardial 



Gland of, 939. 

 Optics,' Heath's ' Geometrical, 828. 

 Orange-leaf Scab, 129. 

 Orchil leae. Anatomy of the Stem of, 428. 



, Fertilization of, 432. 



, Morphology of the Flower of, 114. 



Orcin, Double Staining with, 514. 

 " Orderic Vital," 321, 667. 

 Organogeny of the Hirudinea, 88. 

 Orientation of the Embryo, Law of, in 



Insects, 72. 

 Orienting Objects in Paraflfin, 168, 510. 

 Orobanchacese, Cleistogamous Flowers of, 



431. 

 Orthezia cataphracta, 228. 

 Orthonectida, Natural History of, 95. 

 Orthoptera, Preparing Supra-cesophageal 



Ganglia of, 1045. 

 Osborn, H. L., 338, 1041. 



, Osphradium of Crepidula, 376. 



Osmunda regalis and Blechnum occiden- 



tale. Structure of Mucilage - cells of, 



997. 

 Osphradium of Crepidula, 376. 

 Ostroumofl", A. A., Blastogenesis in the 



Bryozoa, 67. 

 , Development of Cyclostomatous 



Marine Bryozoa, 740. 



, Fresh-water Bryozoa, 378. 



, Morphology of Bryozoa, 571. 



, Polyzoa of the Black Sea, 68. 



Otocysts as Organs of Locomotor Orienta- 

 tion, 732. 



, New Function for Invertebrate, 52. 



Otoliths, Function of, 938. 



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



Zembla, 130. 

 Outerbridge, G. E., jun.. The Limit of 



Thinness, 160. 

 Ova, Amphibian, Maturation and Fertili- 

 zation of, 564. 



and Development of Rotatoria, 94. 



Chemical Composition of, 72. 



, Frog, Segmentation of, in Sublimate 



Solution, 370. 



, Insect, Polar Globules in, 576. 



, Insects', Interesting processes in the 



formation of, 574. 



, Modes of preparing, 670. 



of Ants and Wasps, Preparation of, 



841. 

 — — of Lampyris, Photogenic Function of, 



576. 



of Mysis Chamseleo, Preparing, 841. 



, Teleostean Fish-, Relation of Yolk 



to Blastoderm in, 43. 

 Ovarian Ovum of the Dipnoi, 44. 

 Ovaries, Inferior, 266. 

 Ovary of Insects, Origin and Significance 



of Cellular Elements of, 71. 

 Oviatt, B. L., 176. 



