INDEX. 



931 



Nematohelminthes, Classification of, 



340. 

 Nematoid Hsematozoon from a Camel, 



509. 

 Neomenia, Morphology of, ISO. 

 Nepenthes and Crinum, Spiral Cells in, 



813. 

 Nerve-endings of Tactile Corpuscles, 



28. 

 , Striated Muscle of Coleop- 



tera and its, 33. 

 Nerve-fibres, Large, in the Spinal Cord 



of the Pike, 295. 

 of Unionidse, Differentiation 



of Protoplasm in, 767. 

 Nerve-fibrils of the Brain, Preparing, 



426. 

 Nerves in the Cornea, Distribution and 



Termination of, 29. 

 in the Voluntary Muscles of the 



Leech, Termination of, 46. 

 , Motor and Sensory, Differen- 

 tiating, 425. 

 , Motor, in the Striated Muscles of 



Insects, Terminations of, 34. 

 Nervous System, Central, of Annelids, 



Development of, 619. 



, Origin of, 44. 



of Cestoda, 51. 



of Hydroid Polyps, 202. 



— of Larva? of Diptera, 333. 



of Mollusca, 603. 



of Ophiuroidea, 199. 



of Platyhelminthes, 194. 



of Strepsiptera, 499. 



Nest-forms of the Furrow Spider, 613. 

 New Zealand, Blind Subterranean 



Crustacea in, 778. 

 Nicholson, A., 437. 

 Niessl, G. v., 230. 

 Niggl, M., 282. 



Nitrates, Fermentation of, 834. 

 Nitrogen, Nutrient Fluids containing 



various Proportions of, Formation of 



Saccharomyces in, 540. 

 Nitrous Oxide, Action of, on Vegetable 



Cells, 68. 

 Noll, F. C, 8S9. 

 Norner, C, 885. 

 Norwegian North Sea Expedition, 



Holothuridea of, 791. 

 Nose-piece for Binocular Prisms, 684. 



, Watson's Sliding-box, 106. 



Nostoc, Classification of, 93. 

 Nothnagel, H., 234. 

 Notodelphyidse, 506. 

 Notthaft, J., 495. 



Nuclear- and Cell-division in the For- 

 mation of the Pollen of Hemerocallis 



fulva, 809. 

 Nucleated Blood-corpuscles, Differ- 

 ential Staining of, 714. 



Nuclei, Cell-, of Pinguicula and Utri- 



cularia, Crystalloids in, 366. 



of Lieberkuehnia, 802. 



, Staining, Flemming's Modified 



Methods for, 715, 883. 

 Nucleus, Cell-, and Chlorophyll, 69. 

 , Division of, in Spirogyra, 



543. 



, in Chara fcetida, 79. 



, in the Mother-cells of the 



Pollen of Liliacese, 366. 

 of Living Infusoria, Staining, 280, 



576. 

 of the Salivary Cells of the Larva? 



of Chironomus, 185. 

 Nuel, J. P., 26. 

 Numerical Aperture, 151. 

 Nutrient Fluids containing various pro- 

 portions of Nitrogen, Formation of 



Saccharomyces in, 540. 

 Nutrition of Lichens, 240. 

 , Kelation of, to the Distribution 



of the Sexual Organs on the Prothal- 



liuni of Ferns, 374. 



O. 



Oberhauser's Camera Lucida, 679. 



Obituary, 899. 



Objective, Gundlach's ^-inch, 263. 



, Powell's -^ Oil-immersion, 565. 



, Tolles', with tapering front, 589, 



904. 



Objectives, Achromatic, Colour-Correc- 

 tions of, 109. 



, , Number of Lenses required 



in, 107. 



, Aperture of, 149. 



, of, Diaphragms for limiting, 



407. 



, of, Iris Diaphragm for vary- 

 ing, 262. 



, Collar Correction of, 685. 



,Dry and Immersion, Beck's Achro- 

 matic Condenser for, 270. 



, High-power, Statoblasts of Lo- 



phopus crystallinus as a Test for, 129. 



, Homogeneous - immersion and 



Water-immersion, 685. 



, Correction adjustment for, 



407, 854. 



, Powell's -^ -inch, 565. 



, Scratching the Front Lenses 



of, 264. 



, Nelson's Adapter for Rapidly 



Changiug, 858. 



, New Combination for, 551. 



of Small and Large Aperture, 853. 



, Penetrating Power of, 153. 



, Verification of, 109. 



with Large and Small Apertures, 



Relative Value of, 157. 



3 r 2 



