THE TEN-SPINED STICKLEBACK 251 



powdered with little black dots which may be 

 arranged to form irregular bars ; in the breeding 

 season the males are dark brownish. 



In habits this species is rather similar to the 

 preceding one ; it spawns in small streams, where 

 the shoals crowd in close to the banks, and the nests 

 are not built on the bottom, but are attached to 

 weeds or grasses. 



