INDEX. 





Selligues, M., his early construction 

 of Achromatic lenses, 14. 



Sepiola, eggs of, 620. 



Sepiostaire of Cuttle-fish, 605. 



Serialaria, colonial nervous system 

 of, 580. 



Serous Membranes, structure of, 

 717. 



Sertularidce, 540 — 543. 



Shadbolt, Mr., on Arachnoidiscus, 

 300 ; his annular Condenser, 1 15 

 note; his Turn-table, 225, 226. 



Shark, teeth of, 697, 698; scales, 

 &c, of, 703. 



Shell of Crustacea, 648, 649; of 

 Echinida, 555, 556 ; of Foramini- 

 fera, 486—489 ; of Mollusca, 593 

 —606 ; Fungi in, 359. 



Shrimp, shell of, 649. 



Side-Illuminator, 120—122. 



Side-Reflector, Beck's, 122, 123. 



Siebold, Prof., on reproduction of 

 Bee, 685. 



Siliceous Casts of Foraminifera, 

 502, 507 note, 513, 518, 519. 



Siliceous Cuticles, 383, 420. 



Silk-worm disease, 354, 355. 



Silver, crystallized, 769. 



Simple Microscope, principle of, 18 

 — 22 ; various forms of, 46 — 55. 



Siphoaacece, 325 — 330. 



Sipunculus, larva of, 628, 629. 



Siriciclce, ovipositors of, 683. 



Skin, structure of, 717 ; papillae of, 

 731, 746. 



Slider-Forceps, 214. 



Slides, Glass, 201. 



Wooden, 209. 



SI ug, rudimentary shell of, 605 ; 

 tongue of, 606—609 ; eyes of, 619. 



Smith, Mr. Jas., his Mounting In- 



m strument, 213 — 216 ; his Selenite 

 Stage, 120 note; his Object Cabi- 

 net, 235. 



Smith, Dr. Lawrence, his Inverted 

 Microscope, 85, 86. 



Smith, Prof. W., on Diatomaceae, 

 275 note, 181. 



Smith and Beck's Student's Micro- 

 scope, 64, 66 ; their Popular Mi- 

 croscope, 73, 74 ; their Large 

 Compound Microscope, 80, 81 ; 

 their Achromatic Condenser, 

 108 ; their Binocular Magnifier, 

 186 ; their arrangement of Polar- 

 izing apparatus, 118, 119 ; see 

 Beck, Mr. R. 



Smut " f WV10-.+ Q«q 



Snow-crystals, 768. 

 Societyof Arts' Microscope 



50, 51 ; Compound, 58, 

 Soemmering, his speculu 

 Sole, skin and scales of, 7 

 Sollitt, Mr., on Diatom-tt 



182. 

 Sorby, Mr., his Spectrosc 



piece, 92, 93 ; his M 



examination of Rocks. 



767. 

 Soredia of Lichens, 351. 

 Sori of Ferns, 377. 

 Spatangidium, 299. 

 Spatangus, spines of, 559, 

 Spencer, Mr. , his method 



ing thin glass, 204. 

 Spectacles, for Dissection 

 Spectroscope Eye-piece, 9 

 Speculum, Parabolic, 122, 

 Spermatia of Lichens, 35: 

 Spermogonia of Lichens, 

 Sphacelaria, 344, 345. 

 Sphceria, development 



Animals, 356. 

 Sphceroplea, sexual reprod 



332, 333. 

 Sphcerosira volvox, 255. 

 Sphcerozoum, 450. 

 Sphagnum, peculiar cells 



occurrence of Rotifer in 



of, 370, 469. 

 Spherical Aberration, 9; 



reducing and correcting 

 Spicules, of Sponges, i 



preparation of, 531, 532 



onian Zoophytes, 551 ; 



604. 

 Spiders, eyes of, 687 ; re 



organs of, 687 ; feet of, 



spinning apparatus of, t 

 Spinal Cord, mode of j 



sections of, 733 note. 

 Spines of Echinus, &c, I 



mode of making sectioi 



—565. 

 Spinning-apparatus of 



687, 688. 

 Spiracles of Insects, 674 — 

 Spiral Cells of Sphagnum 



Orchideae, 397. 



Fibres, 398. 



Vessels, 402, 403 ; i 



426. 

 Spiriferidce, shell-structur. 

 Spirillina, 500. 

 Spirogyra, 335. 



Spirolilfta 490 



