LEPADELLA. 155 



its progress through the water does not seein 

 to be impeded. 



Eattulus lunaris (Drop IV. fig. 7) is one of 

 the smallest of the Rotatoria, but often seen in 

 turfy pools, and soon distinguished by its dimi- 

 nutive size and curved body ; the foot is short, 

 and curved also. 



The genera mentioned from Notommata to 

 Eattulus have no lorica. 



The individuals of the next family are clothed 

 with a lorica ; some of the genera are common, 

 and interesting. Lepadella ovalis (Drop IV. 

 fig. 8) is often seen in immense numbers in 

 stagnant water, and is a pretty and lively 

 animalcule, though said not to possess eyes ; it 

 guides itself, however, with unerring precision, 



