INDEX. 



351 



crack-slide, i. 152, 162; his crystalliza- 

 tions from silicated solutions, ii. 321. 



Sladen, Mr. P., on preserving Echino- 

 derm larvae, ii. 153. 



Slider-Forceps, i. 185. 



Slides, Glass, i. 175, 176. 

 Wooden, i. 183. 



Slug, rudimentary shell of, ii. 179; pal- 

 ate of, ii. 181, 182; eyes of , ii. 190. 



Smith, Mr. Jas., his Mounting Instru- 

 ment, i. 186; his use of Bull's-eye 

 Condenser, i. 118. 



Smith, Dr. Lawrence (U. S.), his In- 

 verted Microscope, i. 82. 



Smith, Prof. H. L.^U. S.), on Binocular 

 Eyepiece, i. 33; his vertical Illumin- 

 ator, i. 118; his cells for dry-mounting, 

 i. 180; on mounting Diatoms, i. 306. 



Smith, Prof. J. Edwards (U. S.), on de- 

 velopment of (Edogonium, i. 257; on 

 wide-angled Objectives, Preface, vi., 

 vii. 



Smith, Prof. W., on Diatomaceae, i. 

 170, 273, 301 note. 



Smith and Beck, see Beck, Messrs. 



Smut, of Wheat, i. 323. 



Snail, palate of, ii. 181, 182; eyes of, ii. 

 190. 



Snake, lung of , ii. 299. 



Snow crystals, ii. 318. 



Social Ascidians, ii. 166-168. 



Soemmering's speculum, i. 97. 



Sole, skin and scales of, ii. 261, 262. 



Sollitt, Mr., on Diatom-tests, i. 170. 



Sorby , Mr. , on skeleton of Echinoderms, 

 ii. 146 note; his Spectroscope Eye- 

 piece, i. 90; his Microscopic examina- 

 tion of Rocks, ii. 314, 315 note. 



Soredia of Lichens, i. 329. 



Sori of Ferns, i. 344-346. 



Spatangidium, i. 291. 



Spatangus, spines of, ii. 143. 



Spectacles, for Dissection, i. 187. 



Spectro-Micrometer, Browning's, i. 91. 



Spectroscope Eye-piece, i. 90. 



Spectroscopic Analysis, principles of, i. 

 89-92. 



Speculum, Parabolic, i. 116, 117. 



Spermogonia of Fungi, i. 322; of Li- 

 chens, i. 330. 



Sphacelaria, i. 332. 



Sphceria, development of, within Ani- 

 mals, i. 318. 



Sphceroplea, sexual reproduction of, i. 

 255. 



Sphcerosira volvox, i. 243. 



Sphcerozosma, i. 266. 



Sphcerozoum, ii. 115. 



Sphagnacece, peculiarities of, i. 342-344; 

 occurrence of parasites in leaf-cells 

 of, i. 327, ii. 53. 



Spherical Aberration, i. 6, 7; means of 

 reducing and correcting, i. 7, 8. 



Spicules of Sponges, ii. 120-122; Alcy G-- 

 man Zoophytes, ii. 136; of Doris, ii. 

 179. 



Spiders, eyes of, ii. 250; respiratory 

 organs of, ii. 250; feet of, ii. 250; spin- 

 ning apparatus of, ii. 251. 



Spines of Echinida. ii. 142, 143; mode 

 of making sections of, ii. 146, 147; of 

 Spatangus, ii. 143. 



Spinning apparatus of Spiders, ii. 251. 



Spiracles of Insects, ii. 239-241. 



Spiral Cells of Sphagnum, i. 343; of 

 Orchideae, i. 360; of anthers, i. 384. 



Crystallization, ii. 321. 



Ducts, i. 366. 



Fibres, i. 361. 



Vessels, i. 364; in petals, i. 383. 



Spiriferidce, Shell-structure of, ii. 178. 



Spirillina, ii. 85. 



Spirillum, i. 312. 



Spirolina, ii. 72. 



Spiroloculina, ii. 71. 



SPONGES, general structure and relations 

 of, ii. 117, 118; reproduction of, ii. 118; 

 skeleton of, ii. 119-122; fossil, ii. 307, 

 308. 



Spongilla, ii. 118, 121. 



Spongiole of Root, i. 375. 



Spores, different kinds of, i. 228-230; 

 of Fungi, general diffusion of, i. 321- 

 323; of Hepaticae, i. 338; of Mosses, 

 i. 342; of Ferns, i. 345-348; of Equise- 

 taceae, i. 349; see Oospores and Zy- 

 gospores. 



Spot-Lens, i. 107. 



Spring-Clip, i. 186. 



Press, i. 186. 



Scissors, i. 188. 



Squirrel, hair of, ii. 264. 



Stage-centering adjustment, i. 80. 



Stage, Glass, i. 63. 



Stage, Safety, i. 120. 



Stage-Forceps, i. 120. 



Stage-Plate, glass, i. 122. 



Stage- Vice, i. 121. 



Staining Processes, i. 204-208. 



Stanhope Lens, i. 21. 



Stanhoscope, i. 21. 



Star- Anise, seed-coat of, i. 360. 



Starch-granules, in Cells, i. 361, 362; 

 appearance of, by Polarized light, 

 i. 362. 



Star-fish, Bipinnarian larva of, ii. 150, 

 151. 



Stato-spores, i. 230 note; of Volvox, i. 

 244; of Hydrodictyon, i. 253. 



Staurastrum, prominences of, i. 263; 

 self-division of, i. 265; varieties of, 

 i. 272. 



Stauroneis, i. 299. 



Steenstrup, Prof., on Alternation of 

 generations, ii. 134. 



Stein, Dr., his doctrine of Acineta 

 forms, ii. 41 note, ii. 52 note; his re- 

 searches on Infusoria, ii. 63 note. 



Steinheil Doublet, i. 21. 



Stellaria, petal of, i. 343. 



Stellate cells, of Rush, i. 354, 355; of 

 Water lily, i. 354, 355. 



