70 



VIGNETTES FROM INVISIBLE LIFE. 



animalcules, or rather compound purses, for this 

 purse -form is not confined to their exterior; the 

 internal digestive cavities are little cells or pouches, 

 attached by " short stalks " to the alimentary canal, 



FIG. 11. Bursaria truncatella. 



and are capable of receiving and digesting large 

 quantities of food, both animal and vegetable. The 

 large aperture named a mouth in the Bursaria 

 truncatella is lined with cilia, as is also its 

 entire body, interior and exterior alike. Indeed 

 the whole body is one delicate ciliated membrane or 

 cell, in which are hung sundry digestive pouches ; 

 and the creature seems formed with a view to the 



