194 



LIST OF GENERA AND SPECIES. 



Volvox stellatus .... 

 Vorticella campanula 



convallaria (Drop III. fig. 2) . 



Xanthidium aculeatum . 



armatum (Drop I. fig. 5) 

 Zoothamnium arbuscula 



Page. 

 102 



125 



120 



65 



64 



128 





Printed by Reeve and Nichols, 5, Heathcock Court, Strand. 





