INDEX. 



721 



determination of magnifying power of, 

 199, 200. 



Object-glass holder, Mr. Brooke's, 127. 



Object-Marker, 127, 128. 



Objects, mode of mounting, dry, 221-224 ; 

 in Canada balsam, 224-232; in preserva- 

 tive fluids, 232-242; see Opaque and 

 Transparent Objects. 



Oblique Illuminators, 135-138, 173, 174. 



Ocelli of compound eyes of Insects, 561. 



(Edogonium, zoospore of, 318 ; sexual re- 

 production of, 319. 



Oil-globules, microscopic appearances of, 

 184. 



Oleander, cuticle of, 389. 



Oncidium, spiral cells of, 368. 



Onion, raphides of, 371. 



Oolite, structure of, 634. 



Opaque Objects, arrangement of Micro- 

 scope for, 175-177 ; various modes of illu- 

 minating, 177-180 ; modes of mounting, 

 121-124. 



Opercula of Mosses, 350. 



Ophiocoma, 482. 



Opkiurida, skeleton of, 482. 483. 



Ophrydina, 423. 



Orbitoides, structure of, 637-639. 



Orbitolite, structure and development of, 

 440-445. 



Ornithorhyncus, hair of, 595. 



Oscillator iacece, 311-313. 



Ovipositors, 578, 579. 



Ovules of Phanerogamia, 399; fertilization 

 of, 48, 399, 400 ; mode of studying, 400, 

 401. 



Owen, Prof., on Fossil Teeth, 641, 642 ; on 

 Fossil Bone, 642, 643. 



Oxytricha-form of Trichoda, 421, 422. 



Pigment-cells, 605. 



Pith, structure of, 378, 379. 



Pinna, structure of shell of, 506-508. 



Pinnularia, 294. 



Placoid scales of Fish, 593. 



Planaria, 533-535. 



Plants, distinction of from Animals, 247, 

 248,409,410. 



Plantago, rotation in hairs of, 366. 



Pleurosigma, 294 ; nature of markings on, 

 281, 282 ; value of, as tests, 195-198. 



Pluteus-larva of Echinus, 488-490. 



Pneumonia, pathological condition in, 661. 



Podura, scale of, 195, 556, 557. 



Polarization, objects suitable for, 645. 



Polarizing Apparatus, 140-143. 



Pollen-grains, development of, 397; struc- 

 ture and markings of, 194, 397-399. 



Polycystina, nature of, 449, 450 ; distribu- 

 tion of, 450-452. 



Polygastrica ; see Infusoria. 



Polyommatus argus, scale of, 557, 558. 



Polypes ; see Hydra and Zoophytes. 



Polypodium, fructification of, 353. 



POLYZOA, 49, 492 ; general structure of, 492- 

 496 ; molluscan nature of, 496 ; classifi- 

 cation of, 497-500. 



Potato-disease, 342. 



Powell and Lealand's Microscope, 110-112 ; 

 their Achromatic Condenser, 133. 



Preservative Liquids, 232-234. 



Primordial utricle, 248. 



Prismatic shell-substance, 



Prisms, Dujardin's, 133 



ce, 506-508. 

 ,131,173; 



Nachet's, 



Palm, stem of, 377, 378. 



Palmellacea, 307-309. 



Palmoglcea macrococca, life-history of, 251- 

 253. 



Pampean deposit, organic composition of, 

 639. 



Papilla? of skin, structure of, 605-615 ; of 

 tongue, 615. 



Parabolic Illuminator, 139, 140. 



Paramecium, 413, 414 ; contractile vesicle 

 of, 417; multiplication of, 418. 



Parasitic fungi, 335-443. 



Pearls, structure of, 509-511. 



Pecari, hair of, 595. 



Pecten, eyes of, 527 ; tentacles of, 528. 



Pediastrum, multiplication and develop- 

 ment of, 270-273. 



Pedicellarice of Echinoderms, 481, 482. 



Penetrating power of object-glasses, 188. 



Pentacrinus, skeleton of, 482 ; larval, 491. 



Peristome of Mosses, 350, 351. 



Perophora, 502-505. 



Petals of Flowers, structure of, 395, 396. 



Pettenkofer's test, 212. 



PHANEROGAMIA , elementary tissues of, 360- 

 376 (see Tissues of Plants); stems and 

 roots of, 376-388 ; cuticle and leaves of, 

 388-394 ; flowers of, 394-401 ; seeds of, 

 401-403. 



Phytelephas, cells of, 368. 



Phyllopoda, 544. 



136; Amici's, 137; Grubb's, 137; pola- 

 rizing, 140, 141. 



Proboscis of Bee, 566, 567; of Butterfly, 

 567, 568 ; of Fly, 566, 567. 



Proteus, 405. 



Protococcus pluvialis, life-history of, 253- 

 257 ; various forms of, 257, 258 ; con- 

 ditions influencing changes of, 258, 259. 



Protoplasm of vegetable cell, 248. 



PROTOPHYTA, general characters of, 247- 

 249. 



PROTOZOA, 404-409 ; their relations to Pro- 

 tophyta, 247, 248, 409, 410. 



Pseudopodia, of Rhizopods, 407-411. 



Pterodactyle, bone of, 642. 



Puccinia, 341. 



Purpura, development of, 521-525. 



Pycnogonidce, 539-541. 



Quekett, Mr., his Dissecting Microscope, 

 94-96 ; his Indicator, 124 ; on Structure of 

 Bone, 642, 643. 



Querquedula crecca, 655. 



Rainey, Mr., his moderator, 156. 



Ramsden's eye-piece, 84, 85. 



Raphides, vegetable, 371, 372. 



Reade, Rev. J. B., on black-ground illumi- 

 nation, 138. 



Reagents, Chemical, use of, in Microscopic 

 research, 211-213. 



Red Corpuscles of Blood, 599, 600. 



Red Snow, 307. 



Refraction, laws of, 65, 66 ; by convex 

 lenses, 65-69 ; by concave and meniscus 

 lenses, 69. 



46 



