OF ANIMALCULES. 67 



its wings. Thus, without confusion or intermixture, each 

 held on its way ; the army which was going upwards 

 marching in two columns to the top, and the other pro- 

 ceeding in great regularity and order in one column to 

 the bottom. This amusing spectacle serves to shew that, 

 however mean or contemptible these creatures may ap- 

 pear to us, the Almighty Power that created them has 

 not left them destitute of sagacity to associate together, 

 and act unanimously for the benefit of the community, 

 both these armies marching as regularly as if under the 

 direction of wise leaders. 



When these animalcules are taken from the ditch, and 

 other water is poured upon them, it is difficult to make 

 them live twenty- four hours ; but when kept in some of 

 the same ditch-water, they may be preserved in good 

 condition for several months. Though they are never so 

 vigorous, nor shew their way of moving from place to 

 place so plainly as when first caught, their kind of mo- 

 tion, as before described, makes it evident, that if they 

 move along the side of a cylindrical glass jar, either up- 

 wards or downwards, it must be in a spiral line, and such 

 it is always found to be. 



96. Vibrio lunula. The Moon-shaped Vibrio. — Two 

 specimens of this animalcule are drawn, magnified, at 

 group 44, which will give the reader a general idea of 

 its form. In the larger drawing, the interior of the 

 animalcule w^as of a green colour, with a row of diapha- 

 nous globules down its centre, and the sides between 

 the granulated parts and the shell almost colourless. 



