210 



W. C. ALLEE. 



In order to understand this typical arrangement of associations 

 jn the depositing shore series it is necessary to know that in the 

 flats of the region there is usually a sand bar formed at the 

 outer edge of the flat which is frequently uncovered at low tide ; 

 farther back on the flats the water becomes slightly deeper in 

 the region of mud and sand and then decidedly deeper until one 

 reaches the Scoloplos acutus association of the eel grass and muck 

 region. As one nears the shore the water becomes shallow again. 



While the series as given is typical of the region there are 



several other possibilities which will be discussed in their proper 



places. 



i. The Rocky Eroding Shore Associations. 



a. The Open Water Association. — The results of analyses of 

 water samples from four inshore stations are shown in Table II. 



Table II. 



Showing Salinity, Temperature, Oxygen Content and pH of 

 Open Water from Inshore Stations. 



1 Collection 7 feet down. 



2 Determination in laboratory. 



* Collection made 12 feet down. 



