67 



Lily Lake is the smallest of the three, and lies only a few rods 

 from the west shore of tlie bay. It is an oval pond of shallow 

 water full of the pads of water chinquepin, and is the only water 

 from which I collected that contained a growth of vegetation. It 

 is pretty well protected on the north and west by forest, which 

 probably prevents to some extent the ravages of overflows. 



LONG LAKE. 



Long Lake, the second of the group, lies a short distance north- 

 west of the preceding. It is nearly three quarters of a mile long, 

 and is a narrow body of rather deep water surrounded by forest. 



BROAD LAKE. 



AVest of the lower half of Long Lake is the third lake of the 

 group. It is broad and shallow, and when visited consisted of a 

 series of detached pools with sloping bottoms of mud so deep as 

 to make it extremely difficult to drag a seine. 



CEDAR CREEK. 



This is a small rapidly flowing creek which comes from the east 

 and, cutting through the blufl^, enters the bay half a mile above 

 the city limits. At its mouth it has deposited a large bed of al- 

 luvium through which one sinks to his knees in wading. A short 

 distance from the bay it becomes rocky, and between the bluffs and 

 in the upper part of its course flows over almost solid limestone. 

 When visited, it was moderately low, and in places were shallow 

 pools connected with each other by narrow reaches along which 

 the water rushed with considerable speed. The water is quite 

 clear notwithstanding the sewage which it receives; yet the in- 

 fluence of the latter is seen in the comparative scarcity of aquatic 

 life for some distance back of the bluff. 



OTHER WATERS. 



The only situations other than those described above, in which 

 collections were made, were a small creek without name just above 

 Quinc}", which is similar to Cedar Creek in every respect except 

 its smaller size, and a muddy pond near the bluff at the southern 

 limit of Quincy. 



It was from the lakes and sloughs thus briefly described that 

 the material was obtained upon which this paper is based. Omit- 

 ting Cedar Creek, the bay, and the river, they have much in 

 common. All were, or are now, subject to overflow by the Missis- 

 sippi. Since the Indian Grave levee was built, the waters within 

 it, — Bear Creek, Harkness and Ballard Sloughs, and Libby Lake, — 

 have not commonly been subject to inundation, — a fact which ex- 

 plains certain special features of the collection taken from them 



