14 University of Michigan 



Hanhury Lake 



Habitat ii. Hanhury Lake. This lake is just southwest of 

 the mining town of \^ulcan in the Menominee Trough, and 

 sewage had made the water very turbid. The shores slope 

 gradually into deep water, except in places along the south 

 side where rock outcrops occur. The marly bottom supports 

 a considerable growth of Chara, some Potamogeton and scat- 

 tered yellow water lilies ; it was littered with water-soaked 

 snags and logs. 



PERMANENT PONDS (TABLE II) 



Habitat 12. Sedge Swamp. Near the main stream of the 

 Sturgeon, below the lower end of the old river channel 

 described in the preliminary discussion, was found a good- 

 sized pond about 2 feet in depth. In most places around its 

 edge the bottom was quite firm, but was somewhat softer 

 toward the center. It was grown up with sedges, etc., and 

 apparently contained water throughout the year. At one end 

 a low strip, grown up with alders, possibly formed a connec- 

 tion between it and the river during periods of extraordinarily 

 high water. 



Habitat ij. Pond at the Falls of the Sturgeon. This small 

 pool, which was on a sandy stretch of the gorge of the Stur- 

 geon above Loretto, is apparently fed by springs, although 

 perhaps the river overflows into it at high water. It has a 

 sandy and rock bottom and contained a few sedges and a con- 

 siderable abundance of algae. 



Habitat 14. Bayou off the East Branch. Near the East 

 Branch, about a mile above Brown Lake, a bayou has been 

 formed from an old river channel. The stagnant water was 

 oily at the surface and was from i to 2 feet deep, and the 

 bottom was covered by a layer of organic muck of about 

 equal thickness. This pool was choked with Philotria cana- 

 densis, Myriophyllum spicatiim and logs, and yellow water 



