1003 



Muscular Contraction in the Crayfish, 

 Form of, 5G2. 



, Microscopical Phenomena 



of, 547. 



Mussels, Fresh-water, Later Stages iu 



the Devehipmeut of, 399. 

 Mycelium, Rate of Growtl: of, 599. 

 Mycoderma vini ami Oidium albicans, 



Relationship of, 453. 

 Mycoidea parasitica, new parasitic 



Alga, 938. 

 Myriapoda. See Contents, xi. 

 Myriothela, Histological Characters 



and Development of, 432. 



N. 



Nachet's Microscope Nouvtau Grand 

 Module Renverse', 765. 



Portable Demonstration Micro- 

 scope, 766. 



Naples, Gulf of, Ctenophora of, 742. 



, Marine Algije of, 762. 



Nebaliad Crustacea as Types of a new 

 Order, 713. 



Nectaries, Anatomical and Pliysio- 

 logical Study of, 748. 



Nematodes in the Caves of Carniola, 

 878. 



Nematoids, Muscle-cells of, 729. 



Nemertinea, Studies on, 723. 



Neomenia and the other Amphineura, 

 404, 706. 



Neovossia, a new Genus of Ustila- 

 ginese, 760. 



Nephropneustous Gasteropoda, Her- 

 maphroditism iu, and the Sperma- 

 tophores of, 304. 



Nerve and Muscle in the Lobster, 

 Physiology of. 872. 



Nerve-cords, Arrangement of, in 

 Anuelides, 569. 



Nerve-fibre, Histology of, 546. 



Nerve Fibres, Optic, and Ganglion-cells 

 of the Mammalian Retina, Isolation 

 of, 614. 



Nerve, Olfactory, and Olfactory Organ 

 of Vertebrates, Development of, 547. 



Nerve-plexus, Terminal, iu the Cornea, 

 848. 



Nerves in the Invertebrata, Structure 

 of, 76. 



of the Proboscis of Diptera, 865. 



Nervous Centres of the Crayfish, In- 

 fluence of Heat on, 714. 



System. Central, of Decapodous 



Crustacea, Structure of, 419, 872. 



, Central, of the Crayfish, 



422. 

 , Effects of Induced Currents 



on, 853. 

 of Insects, 863. 



Nervous System of the Crayfish, Phy- 

 siology of, 713. 

 Newt, Larva of. Method of Examining 



Living Cells of, 765. 

 Nicols in Polarizing Apparatus, the 



exact Orientation of the principal 



Section of, 74. 

 Noctiluca miliaris. Mounting, 464. 



, Reproduction of, 195, 440. 



Northern Seas, Doridae of, 859. 

 Norway, Jensen's TurbcUarian Worms 



of, 573. 

 Nostoc-colonies in Anthocerotea?, 187. 

 in Blasia, Origin of Tubes 



in, 598. 

 Notes and Memoranda, 41, 137, 272, 



395, (545), (692). 

 Notodelphyidaj, 877. 

 Notommata, Parasitism of, on Vau- 



cheria, 291. 

 Werneckii, and its Parasitism iu 



the Tubes of Vaucheria, 530. 

 Nuclei and Cells, 397. 

 , Cell, Micro-chendcal Researches 



on, 847. 



, Picro-carmiue for, 138. 



of tlie Blood-corpuscles of the 



Triton, 272. 

 Nucleus, Cell, various Forms of, 909. 



iu Blood-corpu?cles, 545. 



of the Embryo-sac, 907. 



"Nucule" of Characese, Homology of, 



317. 

 Numerical Apertures, Table of, 839, 



842. 

 Nuphar advenum, Spiral Cells in the 



Root of, 752. 

 Nutrition of Phanerogamic Parasites, 



444. 

 Nyassa, Lake, Algje from, 608. 



Obituary, 333. 



Object-glasses, Homogeneous - Immer- 

 sion, Note on, 394, 489, 490. 



, Improvements in, 75. 



, Wide - angled. Improving 



Spherical Correction in, 812. 



Objective, Bausch and Lonib Ojitical 

 Co.'s new i, 107. 



, Tolles' i Immersion, Note on 



Diagrams exhibiting the Path of a 

 Ray through, 269. 



, Tolles' ^V. 951. 



, Zeiss's yV, 958. 



Objectives, Iloiiiogeneous -Immersion, 

 and the Vertical Illuminator, 266. 



, Homogeneous-Immersion, Mix- 

 ture of Oils for, 332. 



, Immersion, Aperture Measure- 

 ments of, 842. 



