34 FOWLER : 



Petromyzon marinus (Linnaeus) — Lamprey. 



Taken in the shad and herring nets during the spring. No 

 specimens were obtained, though doubtless the lamprey is 

 abundant in the Delaware in this section. It ascends tributary 

 streams, where no obstructions occur, during the spring, for 

 the purpose of spawning. 



Acipenser sturio (Linnaeus) — Sturgeon. 



Formerly abundant in the Delaware, though now rarely 

 seen. Kxamples have been secured at Chester and Tinicum. 



Acipenser brevirostrum (Le Sueur) — Short-nosed Sturgeon. 



Doubtless occurs in the Delaware, though no records have 

 been obtained. 



Lepisosteus osseus (Linnaeus) — Gar-pike. 



Though no records have been given, this species also may 

 occur in the river, in Delaware County limits. 



Pomolobus pseudoharengus (Wilson) — Alewife. 



Generally known as "herring" by the fishermen, the ale- 

 wife is abundant in the Delaware during the spring run. 

 Numbers have been found land-locked in the river ditches on 

 Tinicum Island and about Lester. Alewives were also seen at 

 Marcus Hook and Chester. Two other species (P. mediocris 

 and P. aestivalis) likely occur in the Delaware, the former 

 sometimes in the fall, and the latter a little later than the 

 alewives. 



Alosa sapidissiraa (Wilson) — Shad. 



Fisheries are located along the Delaware, mostly as gillers. 

 Shad were seen at Marcus Hook, Chester and Tinicum. Men- 

 haden (Brevoortia tyrannus) are not known from these limits, 

 though they have been found on the opposite New Jersey 

 shore at Washington Park. 



Dorosoma cepedianum (Le Sueur) — Mud-shad. 



Found in the Delaware and tidal reaches of its tributaries. 

 Found at Chester, Marcus Hook and Tinicum. 



