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THE UNIVERSE. 



Their form is, as a rule, fixed, yet some of them change 

 their shape at will, and present to the eyes of the astonished 

 observers so many different aspects that at the expiration 

 of five minutes they cannot be recognized. At one moment 

 they are globular or three-cornered ; an instant after they 

 are seen taking on the appearance of a star. Accordingly, 



\ 



3. Wagener's Lieberkuhnia : LieberJcuhnia Wageneri (Claparede). 



these creatures, with their deceptive changes of form, have 

 received the name of Protei, from the famous sea-god of 

 antiquity, who by his wonderful metamorphoses was ena- 

 bled to elude attempts to catch him. 



Some animalcules of this class surround themselves with 

 self-produced feet like living roots, the arrangement of 



