DIPS INTO MY AQUARIUM. 



199 



my attention. With the one-inch objective I at once perceived a 

 number of tiny elongated specks swimmmg about in all directions. 

 I then turned on the quarter-inch, and this enabled me to decide 

 that a crowd of Euglence had been captured. 



Fig. 7. — EtiglencB. a, pink spot, b, c, vacuoles. 



Not content with the results I next examined these curious 

 objects with an eighth, giving a magnification of about 600 

 linear. Then could be seen several long, spindle-shaped 

 organisms flitting to and fro, which had to be compressed some- 

 what to allow of proper observation. Very pretty they certainly 

 were, notwithstanding the somewhat unsavoury habitat which they 

 seem to prefer. In the anterior portion glittered a tiny pink 

 spot ((^), uncommonly like an eye, but it is declared by the experts 

 that it is not an organ of vision. Around this spot is a clear 

 space, but the mass of the body is bright green. As it glides 

 along the shape often changes. Now it is long and tapering, 

 anon it bulges out at the top, sometimes it is almost spherical, 

 and occasionally it is contorted and corrugated into forms that 

 admit of no geometrical analogies. All these varieties of shape 

 are illustrated in the accompanying engraving ; but it must be 

 understood that every individual assumes all these different 



