52 ANIMAL PAEASITES AND MESSMATES. 



The kind of life led by several of these animalcula3 is as 

 yet little known. 



Mons. Leydig has found in the stomach of the Ilydatina 

 Senta a messmate which much resembles an Euglena, 

 and still more the Distigma tenax, Ehr. - 



