56 



College of Forestry 



with a heavy growth of filamentous algae. The sand is hard 

 and well smoothed. 



North of Dunham Island (200 or 300 feet) there is an 

 extensive shoal about a fourth of a mile in length and upwards 

 of 200 feet in width, the water ranging from one to three feet 

 in depth, dropping, at the west end, to four and six feet and 

 at the east end, from two to five feet. This shoal is very 

 bouldery, the rocks ranging in size from 3 x 2 to 20 x 25 inches. 

 The substratum upon which the boulders rest is firm sand with 

 some gravel. Table No. i indicates the relations of the habitats 

 near Dunham Island. 



Tarle No. I. Dunham Island Habitats 



Habitat number 



Distance from shore (feet) . 



Depth of water (feet) 



Character of bottom 



Unit area (square inches) . 

 Field numbers 



Date (July) 



Fig. of material 



Dianthera americana 



Myriophyllii m verticillatum. 

 Lemna trisulca 



1 

 5-6 



bould. 



32 



701 



6 



2 



sand 



gravel 



16 



700 



ni 



5-30 



1 5-4 

 sand 



16 



702 



705-7 



802 



II 



50 



5 



old 



log 



100 



708 



II 

 42 



V 



300 



1-3 

 bould. 



6x7 

 4x5 

 703 

 704 



II 



43 



2. Lower South Bay 



The area included under this head embraces all of the body 

 of water enclosed by a line drawn eastward from Long Point 

 meeting a line drawn northward from Norcross Point, a total 

 area of 881 acres. This territory is divisible into several 

 smaller areas (see the map, fig. i). 



I. Long Point. This (figs. 6, 7) is a narrow body of 

 land (see the chapter on Topography). The shores are low 

 and there is a heavy growth of vegetation. The bottom areas 

 are sandy or bouldery, the latter condition prevailing at the 



