INDEX. 



783 



Disk-holder, Beck's, 128 ; Morris's, 



129. 

 Dispersion, chromatic, 12. 

 Dissecting Microscope, Quekett's 



simple, 51—53; Beck's, 53—55; 



Nachet's, 55 ; Smith and Beck's 



Compound, 91. 

 Dissection, Microscopic, 185—188. 

 Distoma, 625. 

 Dobie, Dr., on ciliary action in 



Sponges, 527. 

 Dog, epidermis of foot of, 719. 

 D'Orbigny, M., his Classification of 



Foraminifera, 485, 486. 

 Dons, tongue of, 608 ; spicular ske- 

 leton of, 604; development of, 



611—613. 

 Dorsal Vessel of Insects, 771, 772. 

 Dotted Ducts, 403, 404, 

 Double-bodied Microscope, 87. 

 Doublet, Wollaston's, 21. 

 Doublet-Microscope, 48 — 50. 

 Dragon-fly, eyes of, 662 ; larva of, 



672, 676. 

 Draw-Tube, 89, 90. 

 Dropping Bottle, 224. 

 Drosera, hairs of, 419. 

 Dry-mounting of objects, 208—211. 

 Ducts, of Plants, 403, 404. 

 Dujardin, M., on Sarcode, 434; on 



Rhizopoda, 435 ; on Sponges, 



527 ; on Foraminifera, 484 ; on 



Rotifera, 477—480. 

 Duramen, 402, 410. 

 Dusideia, skeleton of, 530. 

 Dytiscus, foot of, 689, 690 ; trachea 



and spiracle of, 675. 



Eagle-Ray, teeth of, 699. 

 Earwig, wings of, 678. 

 Eccremor.arpus, seeds of, 432. 

 Echinida, shell of, 555, 556 ; ambu- 



lacral disks of, 556, 557 ; spines 



of, 557—559, 563—565 ; pedicel- 



lariae of, 569 ; teeth of, 560-562 ; 



metamorphosis of, 570 — 572. 

 Echinodermata, skeleton of, 555 



— 567 ; metamorphoses of, 567 — 



575. 

 Ectocarpecp, 345. 

 Ectosarc of Rhizopoda, 436. 

 Educational Microscopes, 58 — 61. 

 Eel, scales of, 701 ; gills of, 746, 



747. 

 Eels, of Paste and Vinegar, 623. 

 Eggs of Insects, 683—685 ; see 



Winter-eggs. 

 Egg-shell, fibrous structure of, 714; 



calcareous deposit in, 774, 775. 

 Ehrenberg, Prof., his researches on 



Infusoria, 451, 452 ; on Rotifera, 



472, 475, 477 ; on Polycystina, 



525, 526 note ; on composition of 



Green-sands, 507 note. 

 Elastic Ligaments, 715. 

 Elaters of Marchantia, 369. 

 Elementary Parts of Animal body, 



690 ; see Tissues. 

 Elevations, distinction of, from 



depressions, 167. 

 Elytra of Beetles, 678. 

 Embryo, Animal, development of, 



749 ; — see Development. 

 Vegetable, development 



of, 429—431. 

 Embryo-cell, 369, 372. 

 -Enamel of Teeth, 698-700. 

 Encrinites, 563, 573. 

 Encysting process of Infusoria, 



458—462. 

 Endocl rome of Vegetable cell, 242 ; 



of Diatomacese, 212. 

 Endogenous Stems, structure of, 



406—408. 

 Endosarc of Rhizopoda, 436. 

 Enterobryus, 356 — 358. 

 Entomostracous Crustacea, 638 ; 



classification of, 639 — 642 ; repro- 

 duction of, 642—645. 

 Entozoa, 621 ; Cvstic, 622 ; Neina- 



toid, 622, 623 ; "Trematode, 625. 

 Eozoic Limestones, 760. 

 Eozbon Canadense, 517 — 521. 

 Ephemera, larva of, 653, 654, 672. 

 Ephippium of Daphnia, 643, 644. 

 Epidermis of Animals, structure 



of, 718—720. 



of Plants, 420. 



Epithelium, 720, 724 ; ciliated, 721. 

 Epithemia, 290 ; conjugation of, 



285, 286. 

 EuvAsetacea, cuticle of, 383 ; spores 



of, 383, 384. 

 Erecting prism, Nachet's, 91. 

 Erector, Lister's, 90. 

 Errors of Interpretation, 164 — 170. 

 Eudendrium, 540. 

 Eunotiece, 290, 291. 

 Euplectella, 528, 529. 

 Eupodiscea', 301. 

 Earyale, skeleton of, 562, 563. 

 Exogenous Stems, structure and 



development of, 4u8 — 415. 

 Eyes, care of, 142, 143. 

 Eyes of Mollusks, 619 ; of Insects, 



661—664 ; of Trilobite, 761, 762. 

 Eye-piece, 25 ; Huyghenian, 25, 



26; Ramsden's, 26, 27; Kellners, 



27 ; Binocular, 35 ; Erecting, 91 * 



Spectroscope, 92 ; Micrometric, 



93—97. 

 Collins's shades for, 74. 



