WHITEBAIT. 191 



Another species, the spotted goby (G. minutus) is 

 much smaller in size, and very closely resembles the 

 sandy bottom in which it hides, so that it often 

 requires a keen eye to detect it when hiding up. 

 Among fishermen this species goes by the name of 

 " polewig," or " pollybait," and as it abounds in the 

 lower part of the Thames, it goes largely to make up 

 the somewhat heterogeneous piscine compound known 

 as " whitebait '' I 



