1008 



Solenopus, Organization of, 550, 706. 



SoUas, W. J., Observations on Dactj'- 

 localyx pumiceus (Stutchbury), &c., 

 122. 



Sorby, Dr., at Cambridge, 619. 



Sorby's New Micro-spectroscope, 81. 



Spaces, Intercellular, Relationship of, 

 to Vessels, 912. 



Spectrum, different Colours of, Influ- 

 ence of, on Animals and Plants, 138. 



, diflerent Colours of. Influence of, 



on Animals, 273. 



, Soliir, different Colours of. Influ- 

 ence on Infusoria, 900. 



Spermatophores of and Hermaphrodit- 

 ism in the Nephropneustous Gastero- 

 poda, 304. 



of the Earth-worm, 730. 



Spermatozoa of the Trout, Vitality of, 

 84i. 



Sperm-formation in Spongilla, 73. 



Sphseria, Subgenus of, Sporormia, 600. 



Sphfcriacese, New Genus of, 759. 



Spherical Correction, New Methods for 

 Improving, 812. 



Spiculation of an unknown Sponge, 

 500. 



Spicules, Sponge, 177. 



Spider, Basilica, and her Snare, 559. 



Spiders, Aeronautic Flight of, 561. 



■ , Developmental History of, 294. 



, Natural Classification of, 293. 



, Pairing of, 870. 



Spinal Ganglia and Dorsal Medulla of 

 Petromyzon, 851. 



Spines of a Braeliiopod, Barbed Hook- 

 lets on, 553. 



of Echini, 171. 



Spinning Glands of the Silkworm, 

 297. 



Spiral Cells in the Root of Nuphar ad- 

 venum, 752. 



Sponge, Borings of, in Marble, 82. 



, Excavating (Alectona Millari), 



493. 



, Parasitism of a Coral on, 96. 



Spicules, 177. 



, unknown, Spiculation of, 500. 



Spongelia, Structure of, 436. 



Sponges, a Hydro id inhabiting (Spongi- 

 cola fistularis), 431. 



■ , Horny, Development of, 897. 



Spongicola fistularis, a Hydroid inhabi- 

 ting Sponges, 431. 



Spongilla, Morphology and Systematic 

 Position of, 177. 



Spongilla, Sperm-formation in, 73. 



fluviatilis. Development of, 174. 



Spongiological Studies, 894. 



Spores, Fern, Germination of, 916. 



, Mobile, Influence of Light on the 



Movements of, 447. 



Spores of Fungi, Change of Colour in, 

 315. 



of Volvox dioicus, Germination of, 



95. 



on the upper side of the Pileus 



in Hymenomycetes, 314. 

 Sporormia, a Subgenus of Sphseria, 



600. 

 Stage, Contrivance for Holding Objects 

 beneath, 466, 624. 



Illuminator, Immersion, 837. 



, Thin, 465. 



Staining, another Method of, 163. 



, Cochineal for, 43. 



Fluids for Vegetable Tissues, 942. 



for Fungi, 170. 



Material, Orchella as, 59. 



Method, Brosicke's, 764. 



Processes, Seller's, 613. 



Solution, Logwood, 940. 



Staining-fluids, 612. 

 Stalactites, Fungi of, 316. 

 Standard Micrometers, 332, 349. 

 Starch, Modifications which it under- 

 goes from a Physical Point of View, 

 752. 

 Starch-transforming Ferments, 595. 



, New Genus of, 283. 



Starfishes, " Comet-forms " of, 576. 

 Stein's ' Organismus der Infusions- 



thiere,' 590. 

 Stentors, Organs of Attachment of, 83. 

 Stephenson, J. W., A Catoptric Im- 

 mersion Illuminator, 36. 

 , Note on Homogeneous-Immer- 

 sion Object-glasses, 490. 



, Table of Numerical Apertures, 



839. 



, the Vertical Illuminator and 



Homogeneous-Immersion Objectives, 

 266. 

 ! Stephenson's System of Homogeneous 

 j Immersion for Microscope Objectives, 

 i 256. 



i Stolterfoth, H., on a new Species of 

 j the Genus Eucampia, 835. 

 ; Stripe, Primitive, in the Chick, 395. 

 ' Strychnine, Action of, on Gastero- 

 podous Molluscs, 705. 

 Subalpine Desmiciie£e, 607. 

 Submersion, Effects of, on Aerial 

 Leaves, and of Water on Floating 

 Leaves, 750. 

 Sub-stage Illumination, Revolver Im- 

 mersion Prism for, 32. 

 Sucking Plate of Dytiscus, 300. 

 j Sugar - refining Gum, Leuconostoc 



mesenteroides, 928. 

 I Support for the Head in Drawing with 

 the Camera Lucida, 187. 

 Swarmspores of Chroolepus, Conjuga- 

 tion of, 601. 



