ILLUSTRATIONS IN THE TEXT. XV11 



FIGS. PAGE 



79.Hyalosplienia papilio . . . .82 



80. ,, cuneata. . . .84 



81, 82. elegans : forms of test . . 90 



83, 84. sinuosa : encysted and active . 91 



85. Nebela collaris : conjugation . . .96 



86. ,, test inhabited by a rotifer . 97 



87-89.- "bipes" . . . .99 



90. tincta : active .... 101 

 91. test . . . .102 



92. " Difflugia proteiformis " ? = Nebela tincta . 102 

 93. Nebela tubulosa : quadrangular scales on test 110 

 94. ,, equicalceus . . . .112 



95. barbata : test with " barbs " . . 113 



96. americana . . . .116 



97, 98. dentistoma : test and active individual 120 

 99. caudata .... 125 



100. triangulata : two examples . .126 



101. var. bicornis . .128 



102. Quadrula symmetrica : test . . . 131 



103. Leptochlamys ampullacea : various aspects . 147 

 104.- Cochliopodium mimttum : various phases . 152 

 105, 106. Difflugia tuberculata : two views in outline . 160 

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

 podia ..... 161 

 110. Difflugia globulus : after Ehrenberg, and the 



same size as his figure . . .162 



