GENUS BIOMYXA— BIOMYXA VAGANS. 287 



numerous, scattered, darkly defined granules. The nucleus was large, 

 globular, and clear, and contained a nucleolus. Mostly, it was central, 

 though frequently displaced from this position in the successive changes of 

 shape of the body. Several contractile vesicles occupied the borders of 

 the latter, exhibiting the usual characteristic movements. None of the 

 specimens contained distinct food, though occasionally colorless vacuoles, 

 apparently different from the contractile vesicles, were observed among the 

 contents. An individual, shortly after being noticed, was seen to discharge 

 a large oval mass with granules, as represented in fig 22. 



