THE PROTOZOA. 141 



Ditch water and stale infusions of vegetable or ani- 

 mal matter will supply the student with a rich variety 

 of the Protozoa. ■ The empty skeletons of the marine 

 and the fossil forms are frequently seen as microscopic 

 objects ; but these are of little use to the student. 



table kingdom as Algffi, and the Bacteria, or Schizomycetes, 

 usually considered as a low type of Fungi. For the position 

 respectively of these as classed in the vegetable kingdom, see 

 Prantl and Vines's " Text-book of Botany," 



