126 THE BROOK BOOK 



"Go on," we said. 



"At present thirty -six species are known in 

 North America. These belong to three genera : 

 Gyretus, Gyrinus " "There, there, that'll do!" 

 we exclaimed. "Isn't there something more about 

 the habits? Haven't they any ears or noses you 

 can read about?" 



"No," said the Bookworm, looking aggrieved, 

 "but there are some fine scientific names here." 



Whereupon we put our fingers to our ears and 

 made such a hubbub with our boxes and bottles 

 that the reader gave up the effort. 



