3i8 



INDEX. 



Difflugia, 114, 122 



acuminata, 126 

 corona, 126 

 pyriformis, 125 

 Dinobryon, 148, 153 

 Diplodontiis, 285, 287 

 Dipper, tin, useful collecting tool, 



46 

 Dipping-tube, 32 



to make, 34 

 to use, 33 

 Docidium, 71, 81 



Baculum, 81 

 crenulatum, 81 

 Draparnaldia, 102, 108 



glomerata, 108 

 Drawing, camera lucida for, 39 

 the object, 39 

 reflector for, 39 

 Draw-tube, microscope, 10 

 Dry objects, to examine, 25 



to mount, 30 

 Duckmeat (Lemna), 54 



-E 



Eggs of Chironomus, 177 

 Entomostraca,- 259 

 insects, 298 

 rotifers, 218 

 snails, 146 

 snapping-turtle, 218 

 ,Tubifex, 211 

 Turbellaria, 195 

 water-mites,- 284 



Elytra, 297 



Enchytr^us, 201, 203 

 . socialis, 203 

 vermicularis, 203 



Encyonema, 90, 93, 



paradoxum, 93 



Entomostraca and Phyllopoda, 

 257, 266 



key to genera, 264 

 antennae, 258 

 beak, 264 



Entomostraca, effect of heat on, 

 262 



egg's of, 259 

 eyes of, 259 

 feet of, 258 

 habitats of, 261 

 heart, 259 

 key to genera, 264 

 literature, 278 

 pigment fleck of, 259 

 reproduction, 260 

 usefulness of, 261 



Epidermis of leaves, 302 



Epistylis, 147, 151 



Epithemia, 91, 94 



turgida, 94 



Equisetum spores, 305 



Erigeroh, spheeraphides in, 306 



Estheria, 265, 274 



Euastrum, 71, 79 



ansatum, 80 

 crassum, 80 

 didelta, 8p 



Euglena, 148, 159 



Euglypha, 115, 129 



alveolata, 130 

 ciliata, 130 ► 

 cristata, 130 



Eunotia, 91, 94 



tetraodon, 94 



Euplotes, 149, 162 



Evaporation from under cover 

 glass, 35 



Excelsior microscope, 5 



Eyepieces, construction of, 11 



