CONTENTS OF THE DROPS. 55 



bog-water, and may be seen in great numbers 

 together. Those contained in the Second Drop 

 are poly gastric, and are often found in prodigious 

 numbers in spring, to the exclusion of others. 

 The individuals of the family Vbrticettina (also 

 Polygastricd) will nearly occupy the Third Drop ; 

 and their beauty is so great, that they fully attract 

 the attention when present in the field of the 

 microscope. The Fourth Drop will be occupied 

 by the class Rotatoria. By this means some of 

 the most striking microscopical objects found in 

 water will have been examined. 



