258 GEOLOGICAL SURVEY OF NEW JERSEY. 



V<n: maximus, Morong. 



Hunterdon : In the Delaware River at Tumble Station 

 Porter. 



P. rufescens, Schrad. 



Warren : In the Delaware River at Belvidere Britton. 



P. Zizii, Mart. & Koch. (P. lucens, L., var. minor, Nolte.)" 



Sussex : Swartswood Lake Porter ; Lake Hopatcong 

 Britton.* 



P. prselongus, Wolf. 



Morris : Budd's Lake Porter, 1869. 



P. perfoliatus, L. 



In ponds and streams. Apparently frequent throughout the 

 State. 



P. crispus, L. 



In streams. Union : Plainfield Tweedy. Morris : Aus- 

 tin ; Lake Hopatcong Porter. Passaic : Passaic Leggett 

 Warren : Musconetcong River Porter. Camden : In the 

 Delaware River Parker. Hunterdon : In the Delaware, rare 

 -Best, 



P. zostersefolius, Schum. (P. compressus, Fries.) 



Bergen : Hackensack River Austin. Sussex : Waterloo 

 Porter. 



P. pauciflprus, Pursh. 



In ponds or slow streams. Frequent in the northern counties. 



P. pusillus, L. 



In ponds and streams. Common throughout the State. 



P. Tuckermani, Robbins. 



In pine-barren streams Austin. Burlington : Near Atsion 

 Canby ; Pleasant Mills E. Dlffenbaugh. Camden : Atco 

 Commons. Gloucester: Near Malaga Parker. 



P. pectinatus, L. 



Bergen : Hackensack River Austin ; Passaic River 

 Schuh. Sussex : Hewitt's Pond, Andover and Lake Grinnell 



* P. lucens, L., is not certainly known from the State. New Jersey specimens re- 

 ferred to it prove to be this species. 



