704 



INDEX. 



Podophrya 



Pcidosira 



Podosphenia 



Polyarthra 



Polysclmis 



Polysolenia . 



Polythalamia 



Polytoma 



Porocyclia 



Prorocentnim 



Prorodon . 



Prorostaiirus 



Pseudo-difflugi 



Ptygiira . 



Pyxidiciila 



Ploesconia 



Ptorodina 



Rattulus . 



Rhabdomena 



Ehaphidogloea 



Rhaphoneis . 



Rhilihidophora 



Ehizonotia • 



Rhizopoda 



Ehizoselenia 



Rotifer . 



Saccidus 



Salpina 



Scaridium 



Scenedesmus 



Sceptroneia 



Schizonema 



Squamella 



Si)atliidium 



Sphaerastnun 



Sphaerosira 



Sphserozosma 



Spii-illina . 



SpmUiim 



Spii-ochoeta 



Spirostomum 



Sphenella . 



Sphenoderia 



Splienosira 



Sph'otsenia 



Spondylomorum 



Staurastrum 



Stauroneia 



Staiiroptera 



Staiirosira 



Stentor . 



Stc'phanoceros 



Stephanodiscua 



Stt'ijhaiKjgonia 



Stephanops . 



Stcphaiiopyxis 



Stejjhanosira 



Stxiatella . 



Paor. 

 441 

 596 

 401 

 442 

 639 

 158 

 504 

 443 

 476 

 159 

 443 

 444 

 649 

 685 

 446 

 446 

 271 

 447 

 147 

 647 

 545 

 569 

 ^68 

 581 

 643 

 559, 560 

 523 

 556 

 138 

 448 

 213 

 645 

 294 

 617 

 448 

 137 

 144 

 665 

 525 

 525 

 159 

 589 

 566 

 595 

 126 

 546 

 170 

 166 

 151 

 162 

 526 

 519 

 256 

 436 

 541 

 449 

 293 



S. Steaker, 80, BisHOFSOAiE Strket Within, 



