INDEX. 



347 



Mya, structure of hinge-tooth of, ii. 175. 

 Mycelium of Fungi, i. 320-825. 

 Myliobates, teeth of, ii. 258, 259. 

 Myriapods, hairs of, ii. 228. 

 Myriothela, amoeboids in, ii. 122. 

 Myxomycetes, i. 325-327. 



Nachet, M., his Stereoscopic Binocular, 

 i. 28, 29; Stereo-pseudoscopic Binocu- 

 lar, i. 83-35; Binocular Magnifier, i. 

 48, 49; Student's Microscope, i. 63, 64; 

 Chemical Microscope, i. 82, 83; Min- 

 eralogical Microscope, ii. 315-317; 

 Erecting Prism, i. 88; Camera, i. 98. 

 Porte-Objectif, ii. 333. 



Nacre, structure of, ii. 173, 174. 



Nais, ii. 202, 203. 



Nassula, teeth of, ii. 43. 



Navicellse of Gregarinida, ii. 22. 



Naviculce, i. 298; movements of, i. 283. 



Needles for Dissection, i. 188. 



Nematoid Entozoa, ii. 193, 194. 



Nemertes, larva of, ii. 198, 199. 



Nepa, trachea! system of, ii. 239. 



Nepenthes, spiral vessels of, i. 364. 



Nervous Tissue, structure of, ii. 284, 

 285; mode of examining, ii. 286. 



Net, Collector's, i. 219-221. 



Nettle, sting of, i. 379. 



Neuroptera, circulation in, ii. 237, 240; 

 wings of, ii. 241. 



Neutral-tint Reflector, i. 98. 



Newt, circulation in larva of, ii. 288. 



Nicol-Prism, i. 111. 



Nitella, i. 259. 



Nitzschiece, i. 287. 



Nobert's Test, i. 169, 170. 



Noctiluca, ii. 33-37. 



Nodosaria, ii. 85. 



Nonionina, ii. 94. 



Nose piece, i. 99. 



Nostochacece, i. 249. 



Nucleus, of Vegetable cells, i. 225-228; 

 of Animal cells, ii. 254. 



Nudibranchs, development of, ii. 185, 

 186. 



Numerical Aperture of Objectives, ii. 

 327. 



Nummulinida, ii. 69, 91-101. 



Nummulite, structure of, ii. 94-98. 



Nummulitic Limestone, ii. 94, ii. 309. 



Nuphar lutea, parenchyma of, i. 854, 

 355. 



Oak, galls of, ii. 245. 



Object-Glasses, Achromatic, principle 

 of, i. 7-10; Angular aperture of, i. 8, 

 i. 161-163; ii. 327; Numerical aperture 

 of, ii. 327; construction of, i. 11-16; 

 immersion, i. 16-18; adjustment of, 

 for covering glass, i. 14, i. 139-141; 

 adaptation of, to Binocular, i. 35-38; 

 working distance of, i. 161; defining 

 power 'of, 161-163; focal depth of , i. 

 163; increase of, with Binocular, i. 38; 

 resolving power of, i. 164; flatness of 



field of, i. 164; comparative value of 

 i. 161-165; Preface, v., vi.; different 

 powers of, tests for, i. 165-173; de- 

 termination of magnifying power of, 



Object-Holder, i. 121, 122. 



Objects, mode of mounting, dry, i. 179, 

 183; in Canada balsam, i. 213, 214; 

 in preservative media, i. 209-213; in 

 cells, i. 215-217; see Opaque and 

 Transparent Objects. 



labelling and preserving of, 



i. 218, 219. 



collection of, i. 219-221. 



Oblique Illuminators, i. 104, 105. 



Ocelli of Insects, ii. 229-231. 



Octospores of Fuci, i. 333. 



(Edogoniece, i. 257, 258. 



Oidium, i. 323. 



Oil-globules, microscopic appearances 

 of, i. 152, 153. 



Oil-immersion Objectives, i. 17, 18; ii. 

 329. 



Oleander, cuticle of, i. 378; stomata of, 

 i. 380. 



Oncidium, spiral cells of, i. 361. 



Onion, raphides of, i. 363. 



Oogonia of Fucaceae, i. 333. 



Oolite, structure of, ii. 282. 



Oospores, i. 228, 229; of Volvox, i. 243; 

 of Achlya, i. 251 ; of Sphaeroplea, i. 255; 

 of (Edogonium, i. 258; of Batracho- 

 spermeae, i. 259; of Chara, i. 262; of 

 Fucaceae, i. 333. 



Opaque Objects, arrangement of Micro- 

 scope for, i. 147-150; modes of mount- 

 ing, i. 179, 183. 



Operculina, ii. 94-96. 



Ophiocoma, teeth and spines of, 'ii. 145. 



Ophioglpssece, prothallium of, i. 848. 



Ophiurida, skeleton of, ii. 145; develop- 

 ment of, ii. 151. 



Ophrydince, ii. 46. 



Orbiculina, ii. 72, 73. 



Orbitoides, structure of, ii. 100, 101. 



Orbitolina, ii. 90. 



Orbitolites, structure and development 

 of, ii. 70, 73-77; fossil, ii. 305. 



Orbulina, ii. 86. 



Orchideous Plants, i. 360. 



Ord, Dr. W. M., on Calculi, ii. 326. 



Ornithorynchus, hair of, ii. 265. 



Orthoptera, wings of, ii. 242. 



Osmic acid, uses of, i. 203. 



Osmunda, prothallium of, i. 348 note. 



Oscillatoriacece, i. 247, 249. 



Ostracea, shells of, ii. 175, 176. 



Ostracoda, ii. 207. 



Otoliths of Gasteropods, ii. 190; of 

 Fishes, ii. 324. 



Ovipositors of Insects, ii. 245, 246. 



Ovules of Phanerogamia, i. 352; fertili- 

 zation of, i. 385; mode of studying, 

 i. 385, 386. 



Owen, Prof., on fossil Teeth, ii. 311; on 

 fossil Bone, ii. 312. 



