84 MAKVELS OF POXD-LIFE. 



observer will be pleased to watch its singular aspect 

 and lively motions. Its size, according to the "Mi- 

 crographic Dictionary," varies from 1-710" to 1- 

 220", and while its general proceedings may be 

 watched with an inch or two-thirds object glass, 

 and the second eye-piece, a power of five hundred 

 linear (obtained by a quarter or a fifth) is required 

 to make out the details of its structure. If placed 

 in a live-box with threads of conferva, and a little 

 decayed vegetation, it may be observed to grope 



'4$ 



520 

 Chaetonotus larus, (cra-wling.) 



about among them, and shake them like a dog. 



We have said that water-fleas were among the 

 inhabitants of a bottle filled at the pond, and as 

 they go the way of all flesh, it is common to 

 find some odd-looking animalcules ready to devour 

 their mortal remains. These are creatures shaped 

 like beer-barrels, upon shoi't legs, and which swim 

 with a tubby rolling gait. Looking at one of these 

 little tubs lengthwise, a number of lines are seen, 

 as though tlie edge of eacli stave projected a little 



