130 DROPS OF WATER. 



and supported by a short stiff stalk : the body 

 is yellow; often attached in numbers to the 

 Cyclops quadricornis. 



We now come to a part of the classification 

 where the families and genera are exceedingly 

 difficult to describe ; I shall only, therefore, 

 mention a few of the most striking, leaving the 

 student to refer to works of greater science when 

 the excited curiosity is anxious to be satisfied. 

 The little creatures are of higher organization 

 than those described before, and many of them 

 much larger. They are all more or less bladder- 

 shaped, the body generally covered with delicate 

 cilia, some possessing loricas, and others none; 

 some, bristle-like appendages, and a few having 

 long necks ; they either swim about or creep on 



