108 



even the truncated extremities of the body (f. f.), 

 placed on the edges of that surface. The foot (b.), 

 resembling a scarcely perceptible wart, is to be seen 

 in the axe of the body, between the two openings 



(f. f.). 



The Pharyngoglossa is the only genus of this 

 series, in which the mouth, the alimentary tube and 

 the anus of the animalcule are clearly distinguished. 

 The head (fig. 16. A.) is casely known by the fis- 

 sure of the cuirass , out of which the superior foot 

 (b. b.) comes. We find under this foot the orifice 

 fa.) , in which a stopple is seen (a. a.) moving in 

 and out. From the mouth issues the cylindrical thin 

 gut (f. f.) reaching the back parts of the body and 

 unloading istelf into the orifice of the cuirass, through 

 which the back foot (c. c.) protrudes. 



The Pharyngoglossa is the only animalcule of that 

 series, in which I could distinctly see an ingestion 

 of substance. He pushed the stopple (fig. 16. a. 2 ) 

 much forward, with the help of a very fine and 

 scarcely visible ligament, out of the opening of the 

 intestinal tube , which by analogy we shall call the 

 mouth (a), in consequence of which I saw an empty 

 space between the stople (a. 2 ) and the mouth (a. 1 ). 

 Water, saturated with organic atoms, penetrated of 

 course this empty space, and dragged these atoms 

 into it. Soon after, the second introduction of the 

 stopple (a. 2 ) stuffed the mouth (a. 1 ) and led into 

 it, at the same time , both the water and the sub- 

 stances with which it was impregnated. 



