INDEX. 



319 



Eyepieces, different powers of, 1 1 

 eye-glass of, 11 

 field-glass of, 11 

 why so named, g 



Eyes of insects, 297 

 of spiders, 298 



Eylais, 285, 288 



Feet of insects, 297 

 Field of view, 17 

 Fish, scales of, 299 



small, captured by Utricu- 

 laria, 52 

 Flagella of Infusoria, 136 

 Fleabane, 306 

 Floscularia, 213, 221, 224 

 Flower-de-luce, 306 

 Focus, objects out of, 19 



of compound objective, 18 

 of pocket-lens, 7 ■ 

 Foot of microscope, 10 

 ^-Fragilaria, 90, 92 

 ' ' capucinum, 92 



Fredericella, 244, 249 



Gallic acid crystals, 308 

 Geranium, seeds of, 304 



sphseraphides in, 306 

 Gizzard of insects, 299 

 Gladiolus, crystal prisms, in, 306 

 Glass, thin cover, 27 



thickness of thin, 27 



to clean thin, 28 

 Gnats, scales from, 296 

 Golden-club, 306 

 Gomphonema, 90, 94 



acuminatum, 94 



Growing-slidev a simple, 36 



H 



Hairs, animal, 299 - 



Anthrenus larva, 300 

 plant, 303 



stellate in stems of water- 

 lily, 48 

 stellate in stems of Nu- 

 phar, 49 

 Hawkweed, 306 

 Herrick, C. L., on Entomostraca, 



261 

 Hibiscus, sphjeraphides in, 306 

 Hieracium, crystal prisms in, 306 

 Himantidium, 90, 93 



pectinale, 93 

 Hollyhock, 306 

 Hyalotheca, 71, 73 



dissiliens, 73 

 Hydra, 58, 165 



food of, 167 



parasitic Infusoria on, 170 

 reproduction, 168 

 stings of, 168 

 tentacles, 166 

 to preserve permanently, 

 171 

 Hydra, Trernbley on, 169 

 viridis, 165 

 vulgaris, 165 

 Hydrachna, 285, 287 

 Hydrachnidze, 285 

 Hydrodictyon, 68, 100 



I 



Ichthydium, 182, 184 



concinnus, 185 

 podura, 184 



