196 



Illumination of objects, 



Directions for . . . .9 

 advantages of oblique light 10 

 dark-ground . . 27,28 



lamps 11 



modes of softening light . 10 



Infusoria, Classitication of . 21 



their motions and restlessness 55 



rapid growth of . . 59 



Achieta 31 



appearances and disappearances 



of 130 



circumstances alfecting . 131 

 great work done by . . 191 

 Aspidiscus lynceus . . 97 

 Carchesium . . . .96 

 Cha;tonotus larus . . 82 

 Coleps hirtus . . . .84 

 Cothurnia imberbis . . G6 

 Cryptomonads . . .117 

 Epistylis .... 95 

 Euglenn3 . . .23, 117, 118 

 Euplotes patella . . 86 



Halteria 97 



Ophrydina .... 151 

 Paramecium ... 53 



Stentors 143 



ciliary wreath of . 144 



experiments with . . 148 



in sheaths . . . 146 



modes of propagation . 147 



mouth of . . . 145 



rapid multiplication of . 146 



sudden disappearance of 147 



their changes of form 144, 145 



Trachelius .... 55 



Trachelius ovum . . . 179 



Trachelomonads . . .119 



Trichodina pediculus . 65, 66 



Vaginifera .... 151 



Vaginicola .... 152 



peculiar group of 152, 154 



Vorticella . . 19,29,31,32 



Lindia torulosa . . . 101, 102 



Limnias ceratophylli . . 148 



form of ciliary apparatus 149, 150 



gizzard of . . . . 150 



M 



