748 



INDEX. 



lusects' eggs, 602. 



eyes, 584. 



feet, 587. 



hairs, tenent, 589. 



heads, 582. 



itch, 685. 



injecting, 240. 



ovipositors, 616. 



preparing and mounting, 590, 648. 



■ proboscis, 599. 



spiracles, 586. 



stings, 619. 



tongues, 582, 60T. 



transformations of, 648. 



wings of, 597. 



Interpretation, errors of, 67. 

 InterceUular sub.stance, 662. 

 lodo-quinine, 151. 

 Iris-leaf, 336. 

 Isthniia enervis, 432. 

 Ivory nut, section of, 350. 

 Ixodidie, 642. 



Jackson's micrometer, 51. 



Jelly-fish, 491. 



Johnstone, Dr., on sponges, 3S5. 



on hydra, 471. 



on campanularia, 481. 



Jones, Wharton, on non-striated mus- 

 cular fibre, 698. 



Rymer, on the coretba plumi- 



cornis, 600. 

 Juugermannia bidentata, 310. 



Kettledrum condenser, 174. 

 Kilner eye-piece, 78. 

 Knives for dissecting, 119. 

 Kiilliker on tlie muscles of tlie skin, 



698. 

 Kiitzing on vegetables and animals, 



256. 

 on diatomacese, 417. 



Ladds's microscopes, 84. 

 Lamps, 184. 

 Lamp-shells, 535. 



Lankester, E. R., ongregarina 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. 



Coddington, 34. 



concavo-convex, 19. 



condensing, 183. 



correction of, 28. 



curvature of, 22. 



double convex, 18. 



forms of, 18. 



magnifying power of, 29. 



meuiscu.s, 25. 



tracing rays tlirough, 17. 



Lenses, periscopic, 33. 



plano-convex, 24. 



refraction of light through, 13. 



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 actiniae, 467. 



on life, 655. 



thread cells, 467. 



LibeUulidse, wings of, 597. 



Lichens, 304. 



Lieberkiihn, Dr. N., on gregarina, 369. 



microscope, 5. 



on siiongilla, 389. 



Life, animal, 655. 

 Light, ditlraction of, 68, 



polarisation of, 132. 



Limax rufus, 529. 

 Liinnsea stagnalis, 545. 

 Limnias ceratophylli, 458. 

 Lister's lenses, 13. 



achromatic ■'■orrections, 40. 



List of objects, Wheeler's, 253. 

 Live-box, 194. 

 Liver, diseased, 567. 

 Liverworts, 308. 



Lobb, Mr., on polarising crj'stals, 145. 

 on the iUumiuatiou of test objects, 



61. 



on murasterias, 279. 



Lob-worm, 576. 

 Loligo, palate of, 541. 

 Lophopus crystallum, 525. 

 Loven on mollusca, 538. 

 Louse, 633. 



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

 605. 



on aquatic insects, 626. 



Lucernarida?, 493. 

 Luidia fragilissima, 496. 

 Lung, capillaries of, 690. 

 Lymphatic, vessels of, 669. 



MADREPORtD^, 486. 



Maddox, Dr., wire clip, 214. 



Magnifiers, hand. 33. 



Magnifying power of single lenses, 29. 



of object-glasses, Ross's, 55. 



Powell's, 56. 



Maltwood's finder, 189. 

 Maple-a})his, 613. 

 Marchantia polymori)hia, 308. 

 Mechanical arrangements, 70. 

 Medusie, 492. 



Meissner on the micropyle, 603. 

 Meli(!erta ringens, 459. 

 Melolantha, eye of, 585. 

 Melting vessel, 233. 

 Mercurial injections, 239. 



