166 



THE MICROSCOPE. 



selves to objects by a sucker at the lower part. Some of them have 

 cilia over their entire bodies, and a good fringe over their gaping 

 mouths, which is a type of their ravenous nature. The prey may be 

 seen in their row of stomachs, as if strung like a strap of beads up and 

 down its interior. They differ from many gluttons by possessing great 

 activity, moving swiftly through the water. They are said to increase 

 both by eggs and self-division. There are many species, differing in 

 size, shape, and colour. Usually they are about the hundredth part of 

 an inch in size. When found, they appear a mass of green jelly encir- 

 cling a twig. Often, when swimming, they take the form of a cup, 

 having their tails drawn within their bodies. 



fig. 100. 



1, 2, 3. Hydrce, or fresh-water Polyps, attached to the stem of a plant 4. A group 

 of Stentor polymorphus, or Multi-shaped Stentor. 5, 6. Monads, Viviparous and 

 Cloak Monads. 



Stentor Cceruleus, or Blue Stentor, is remarkable from having a crest 

 extending along its body \ it assumes a peculiar shape when swimming, 

 appearing to possess a thick tail nearly one half the breadth and 

 length of its body. 



Upon quitting these animalcules, we may notice this peculiarity, 

 that when they are procured from infusions the first instances of life 



