758 



INDEX. 



Insects* eggs, 602. 



eyes, 584. 



feet, 587. 



hairs, tenent, 589. 



heads, 582. 



itch, 635. 



injecting, 240. 



ovipositors, 616. 



preparing and mounting, 590, 64S. 



proboscis, 599. 



spiracles, 586. 



stings, 619. 



tongues, 582, 607. 



transformations of, 64S. 



Wings of, 597. 



Interpretation, errors of, 67. 

 Intercellular substance, 662. 

 Iodo-quinine, 151. 

 Iris-leaf, 336. 

 Isthmia enervis, 432. 

 Ivory nut, section of, 350. 

 Ixodidse, 642. 



Jackson's micrometer, 51. 



Jelly-fish, 491. 



Johnstone, Dr., on sponges, 385. 



on hydra, 471. 



on campanularia, 481. 



Jones, Wharton, on non-striated mus- 

 cular fibre, 698. 



Rymer, on the coretha plumi- 



cornis, 600. 

 Jungermannia bidentata, 310. 



Kettledrum condenser, 174. 

 Kelner eye-piece, 78. 

 Knives for dissecting, 119. 

 Kdlliker on the muscles of the skin, 



698. 

 Kutzing on vegetables and animals, 



256. 

 on diatomacese, 417. 



Ladds's microscopes, 84. 



Lamps, 184. 



Lamp-shells, 535. 



Lankester, E. R., on gregarina of earth 



worm, 370. 

 Lathe for polishing, 209. 

 Leaf-insect, 613. 

 Leech, medicinal, 573. 

 Leeuwenhoek's microscope, 6. 

 Lenses, achromatic, 28. 



chromatic, aberration of, 26. 



CoddiDgton, 34. 



concavo-convex, 19. 



condensing, 183. 



correction of, 28. 



curvature of, 22. 



double convex, 18. 



forms of, 18. 



magnifying power of, 29. 



meniscus, 25. 



 tracing rays through, 17. 



Lenses, periscopic, 33. 



plano-convex, 24. 



refraction of light through, 16. 



spherical aberration of, 26. 



Stanhope, 35. 



Lepidoptera, eggs of, 605. 



tongue of, 608. 



wing-scales of, 609. 



Lepisma, 529. 



scale of, as a test, 611. 



Lepralia nitida, 517. 



Leuchart on echinorhynchus, 571. 



Lewes on actinia?, 467. 



on life, 655. 



thread cells, 467. 



Libellulida?, wings of, 597. 



Lichens, 304. 



Lieberkulm, Dr. N., on gregarina, 3C9 



microscope, 5. 



on spongilla, 389. 



Life, animal, 655. 

 Light, diffraction of, 68, 



polarisation of, 132. 



Limax rufus, 529. 

 Limnaea stagnalis, 545. 

 Limnias ceratophylli, 458. 

 Lister's lenses, 13. 



achromatic corrections, 40. 



List of objects, Wheeler's, 253. 



Live-box, 194. 



Liver, diseased, 567. 



Liverworts, 308. 



Lobb, Mr., on polarising crystals, 145 



on the illumination of test objects, 



61. 



micrasterias, 279. 



Lob-worm, 576. 



Loligo, palate of, 541. 



Lophopus crystal! um, 525. 



Loven on mollusca, 538. 



Louse, 633. 



Lubbock, Sir J., on the eggs of insects, 



605. 



on aquatic insects, 626. 



Lucernaridse, 493. 

 Luidia fragilissima, 496. 

 Lung, capillaries of, 690. 

 Lymphatic, vessels of, 669. 



Madreporim:, 486. 



Maddox, Dr., wire clip, 214. 



Magnifiers, hand, 33. 



Magnifying power of single lenses i9 



of object-glasses, Ross's, 55. 



Powell's, 56. 



Maltwood's finder, 189. 

 Maple-aphis, 613. 

 Marchantia polymorphia, 308. 

 Mechanical arrangements, 70. 

 Medussp, 492. 



Meissner on the micropyle, 603. 

 Melicerta ringens, 459. 

 Melolantha, eye of, 585. 

 Melting vessel, 233. 

 Mercurial injections, 239. 



