I 



484 HARSHBERGER— INFLUENCE OF SEA WATER [April 22, 



salt which controls in general the habitats of the several species is 

 graphically shown in the sketch map until a point is reached where 

 the salt marsh vegetation mingles with that of the fresh water 

 marshes until it is gradually replaced by vegetation controlled by 

 fresh water (Fig. 7). 



Sequence of Hydrometric Readings. 

 It is important to give now in sequence the various specific gravi- 

 ties corrected to 15° C. to which readings are appended, the name 



of the plant or the names of the plants subjected to that specific 



density of salt water. The subnumber indicates in all cases the 



number of the observation in the series previously given. 



1.02996-- Spartina stricta maritima, Spartina patens, SaUcornia 

 herbacca. 



1.0278O137 Distichlis spicata, Spartina stricta maritima, SaUcornia 

 herhacea, Limonium carolinianum. 



1.0267O130 J uncus Gcrardi, Limonium carolinianum. 



1.0265O133 Spartina stricta maritima, Limonium carolinianum. 



1.0257O102 Spartina stricta maritima, Limonium carolinianum, SaU- 

 cornia herhacea. 



1.0252O136 Baccharis halinii folia. Aster tenuif alius, SaUcornia her- 

 hacea, Limonium carolinianum, Atriplex hastata. 



i.0224ioi Spartina stricta maritima, Spartina patens, ocean water 

 from surf at Belmar. 



1. 0224^36 water in thoroughfare. 



1. 0217003 water at high tide. Shark River Inlet, covering base of 

 Spartina stricta maritima. 



1.0209O104 J uncus Gcrardi. 



1.0196O1,,.. Spartina patens, SaUcornia herhacea, Limonium caro- 

 linianum. 



1.0193O110 VaUisneria spiralis. 



1.0192O124 Spartina stricta maritima. 



1.0191O1J8 Spartina stricta maritima, Scirpiis pungens. 



1.0191O100 Peltandra virginica. 



i.oi880yi water in channel connecting Manasquan River and Stock- 

 ton Lake fringed with Spartina stricta maritima, SaUcornia 

 herhacea. 



