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 fissure of the cuirass, out of which the superior foot (b. b.) comes. We find under this foot the orifice (a.), 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 (e. 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 substances with which it was impregnated.
