ILLUSTRATIONS IN THE TEXT. XVll 



FIGS. PAGE 



79. — Hyalosplienia papilio . . . .82 



80. — „ cuneata. . 84 



81j 82. — „ elegans : forms of test . . 90 



83, 84. — „ sinuosa : encysted and active . 91 



8.5. — Nebela collaris : conjugation . . .96 



86. — „ „ test inhabited by a rotifer . 97 



87-89.— „ "hipes" . . . .99 



90. — „ tincta : active . . . 101 



91.— „ „ test . . . .102 



92. — " Difflugia proteiformis " ? = Nehela tincta . 102 

 93. — Nehela tuhulosa : quadrangular scales on test 110 



94. — ,, equicalceus . . . .112 

 95.— 

 96.— 



97, 98.— 



99.— 



100.— 



101.— 



barhata : test with " barbs " . 113 

 americana . . . .116 

 dentistoma : test and active individual 120 

 caudata .... 125 

 triaiigulata : two examples . 126 

 „ var. hicornis . 128 

 102. — Quadrula symmetrica : test . . . 131 

 103. — Leptochlamys ampullacea : various aspects . 147 

 104.- — CocMiopodium minutum : various phases . 152 

 105,106. — Bijjlugia tuberculata : two views in outline . 160 

 107-109. — Pontigulasia elisa : two views and pseudo- 

 podia ..... 161 

 110.- — Difflugia globulus : after Bhrenberg, and the 



same size as his figure . . . 162 



