ACTINURUS. 171 



to some substance, and then stretches it and 

 the body out to an immense extent, displaying 

 its rotatory organs, and feeding for an instant, 

 it then contracts, and pursues the same course 

 in a contrary direction. The body is more 

 slender than the Eotifer ; it has two eyes, and the 

 chewing apparatus is very distinctly seen. The 

 tail has three points, or toes, and two little horns 

 attached to one of the joints : these expand, 

 when the parts are stretched out, but as this form 

 would prevent the. joint above that to which 

 they are attached, sliding over them, they have the 

 power of lying flat, and the tube closes without 

 any impediment. This interesting animalcule is 

 not so common as the individuals of the last 

 genus, though frequently found with them. 



