26o 



Allis Shad 



come close together, forming a complete sieve. If reference be made 

 to the illustration one has a better idea of this beautiful construction 

 (Fig. 235). 



There is yet another shad, known as the tvvait shad, which can be 

 identified from the allis shad by its having six to eight spots on its 

 sides, whilst the former has only one behind the gills. In addition 

 to the shads, the smelt and sturgeon invade our fresh waters. 



Fii;. 235.— Mouth (if Shad. 



