INDEX. 



997 



Nectaries of Flowers, 626. 

 Nectria cucurbitula, 84. 



ditissima, 85. 



Nematode Worms in the Urine, 249. 

 Nematoid Parasitic in a Eat, 46. 

 Nephridia and Coelom of Platyhelroia, 



604. 

 Neritina iiuviatilis, Development of, 



877. 

 Nerve, Acoustic, True Origin of, 18. 



, Optic, Spinal Root of, 18. 



Nerve-cells, Peripheral, and Axis-cylin- 

 der in relation to Sense Organs in 



In=ects, 446. 

 Nerve-endings, Sensory, in Skin of 



Insects, 235. 

 Nervous, Digestive, and Eeproductive 



Organs of Onchidium, 230. 

 Susceptibilities, Diverse, of Lower 



Organisms, 52. 

 System and Olfactory Organs of 



the Mollusca, 583. 

 and Sense Organs of Sphse- 



roma serratum, 886. 

 , Central, of Eeptiles and 



Batrachians, 224. 



of Caterpillars, 445. 



of Insects, Comparative An- 

 atomy of, 234. 



of the Ophiuroidea, 606. 



of the Siphonophora, 468. 



, Pedal, of Paludina vivipara, 



27. 

 New England, Marine Algse of, 782. 



Microscopes, Descriptions of, 932. 



Zealand Desmidiese, 647. 



Fossil Bryozoa, 439. 



Nigroslne for Colouring Nuclei of Vege- 

 table Cells, 839. 

 Nitrates, Decomposition of, by Plants 



in the Dark, 914. 

 Nitrogen and Carbon Compounds as 



Sources of Nutriment for the lower 



Fungi, 277. 

 Nobert, the late F. A., 364. 

 Nomenclature of Discomycetes, 925. 

 Nomenclature," " Only a Question of, 



340. 

 North Polar Polyzoa, 30. 



Sea, Echinoderms from, 605 



, new Annelids from, 737. 



Northern Gephyrea, 890. 



" Northern Microscopist," 134. 



Norwegian Desmids, 102. 



Nose-piece, Centering, as a Substage, 



125. 

 Notation for Aperture, the True, 303. 

 Notochord of Mammals, 8. 

 Nuclei and Epithelial Cells, Formation 



of, 16. 

 , Cell-, of Pinguicula and Utricu- 



laria, Crystalloids in, 477. 



Nuclei, Hypertrophy and Multiplication 

 of, in the Hypertrophied Cells of 

 Plants, 267. 



of Vegetable Cells, Nigrosine 



for, 839. 



, Plurality of, in the Siphonese, 



96. 



, Staining, 839. 



Nucleus, Cell-, and Protoplasm, Struc- 

 ture of, 475. 



, Chemical Nature of, 769. 



, in Algse, 289. 



, in the Higher Monocotyle- 

 dons, 265. 



of Vegetable Cells, 264. 



Nudibranch, New, 28. 



Numerical Aperture, 321. 



, Table of, 325. 



Nutriment for the lower Fungi, Carbon- 

 and Nitrogen-compounds as Sources 

 of, 277. 



Nyctaginese, Histology of Stem of, 622. 



O. 



Oak, a Disease of the Root of, Eosel- 



linia (Ehizoctonia) querctna, 87. 

 Obituary, M. Nachet, Sen., and Mr. 



C. A. "Spencer, 970. 



, F. A. Nobert, 364. 



Object Plate and Finder, Smith's, 663. 

 Objective Carrier, Nacbet's, 661. 



" Extractor," Verick's, 662. 



, Homogeneous-immersion, New 



^-inchof 1-43N. A., 942. 



,with extra Front Lenses, 301. 



, Powell's Oil-immersion, of 1'47 



N.A., 714. 



, Eoss, of 1835, 714. 



Objectives, Apertures of Microscope, 



147, 150, 154, 161, 303, 365, 376, 377. 

 , Delineating Power of, and Aper- 

 ture, 347, 356. 



, Dry and Immersion, 305. 



for Microscopical Work, Ideal 



Series of, 679. 

 , Homogeneous-immersion, Gund- 



lach's, 120. 

 , Immersion, Wide-angled, Value 



of, 303, 359, 365. 



, Oil-inimersion, Secure Method of 



Setting the Front Lens of, 121. 

 , with Correction Adjustment, 



519. 



, Penetrating Power of, 831. 



, Sliding, 662 



, The Stokes Immersion and the 



Shadbolt Dry, 333. 

 Oblique Illumination, Mayall's Spiral 



Diaphragm for, 126. 

 Immersion Condenser, Hyde's,524. 



