INDEX. 



305 



Note-book, extract from a boy's, 41. 

 Nupliar, 51. 

 Nymphcea odorata, 50. 



0. 



Objectives, American, 13, 14. 



care of, 15. 



field of, 276. 



French triplet, 13. 



modern American, 14. 



one-fifth preferred to one-fourth, 

 17. 



Objectives, students' series, 16. 



to be selected by the beginner, 

 16. 



Objectives, to focus, 19. 



why so named, 10. 

 Objects, opaque, 276. 



to mount microscopical, 25. 



to prepare microscope for ex- 

 amination of, 24. 



Objects, transparent, 276. . 



worth examining, some common, 

 274. 



Ocnerodrilm, 187, 188, 195. 

 Odontophore of mollusks, 283. 

 (Enothera, raphides in, 289. 

 Oleander, spha:raphides in, 286, 289. 



stomata of, 285. 

 Oliffochceta, 166, 184. 



beneath decaying bark, 189. 



blood of, 186. 



bristles, 184, 185. 



fluid in body cavity, 1SG. 



food, 187. 



key to genera of, 187. 



mouth and alimentary canal, 

 186. 



podul spines, 184, 185. 



reproduction, 1 87. 

 Onion, crystal prisms in, 290. 

 Optical construction of microscope, 



books relating to the, 46. 

 Orontium aquaticum, raphides in, 



289. 



Oscillaria, 103, 105. 

 Oxalis, sphan-aphides in, 289. 



Packard, Dr. A. S., on Branchipus, 

 259. 



Packard, Dr. A. S., on Phyllopod 

 Crustacea, 259. 



Palludicella, 229, 232. 



Paramcecium, 139, 152. 



Passion-flower, 287. 



Paste eels, 184. 



Pedinatella, 224, 229. 

 | statoblasts, 230. ' 



Pediastrvm, 71, 101. 

 I ffrannlatnm, 101. 

 i Penium, 75, 88. 

 ! Brebissonii, 88. 



P/iacus, 139, 150. 

 I longicaudus, 150. 

 j plcuronectes, 150. 



Philodiim, 208, 220. 



Phyllopoda, 243, 245. 



branchial plates of, 243. 



eggs, 244. 



Entomostraca and, 238. 



eyes, 244. 



literature, 259. 



to examine, 244. 



western, 244. 



Pilea pumila. crystals in epidermis 



of, 290. 

 Pinnularia, 94, 99. 



major, 99. 



viridis, 99. 

 Pisidium, 253. 

 Planaria torva, 183. 



Plants, common aquatic, to identify, 



49. 

 Plants, common aquatic, useful to 



the microscopist, 47. 

 Plants, common aquatic, without 



English names, 48. 

 Platycola, 139, 145. 

 Pleuros/fftna, 94, 97. 



angulatum, 98. 

 Plumatella, 229, 231. 

 Pocket-lens, combination, 4. 



employment for, 3, 274. 



simple, 2. 

 Pollen, 286. 

 Polyarthra, 208, 218. 

 Polyzoa, blood of, 227. 



external structure, 222. 



food, 227. 



fresh-water, 221. 



habitats, 222. 



