128 Illinois State Laboratory of Natural History. 



to bay. It formerly entered the bay opposite the north end of 

 Quincy, but the building of an embankment for a railroad 

 bridge cut it off from this outlet so that it now turns west at 

 its lower end and, running along the embankment, empties in- 

 to the river again. Throughout its course it is very nearly 

 parallel with the west shore of the bottom-land, in some cases 

 being only a few rods away from the river. The river enters it 

 four miles northwest of Quincy, and a mile and a half below 

 this it breaks through the bank to the river again, so that at low 

 water its lower part may not be continuous with the rest. It 

 is perhaps three and a half miles long, — a narrow, muddy 

 ditch of shallow water, completely devoid of vegetation, and 

 contaiuiiig such animals only as are so unfortunate as to be eu- 

 trapped in it by the subsiding spring floods. 



GLAUS LAKE. 



This lake is a small temporary pool in the bottom-land 

 about one fourth mile east of the north division of Wood 

 Slough. It is very shallow, — at no ))lace up to the mens' 

 waists; has the usual muddy bottom; and lacks vegetation. 



DEAD man's slough. 



Dead Man's Slough is a name applied Ijy the fishing crew 

 to a shallow, muddy pool in the woods about a quarter of a 

 mile from the river above the north end of Wood Slough. 



MOSS LAKE. 



Moss Lake, on the southern part of Long Island, the larg- 

 est of the LaGrange group, is very similar to the last two in 

 general character, being an isolated jiond in the woods. It is, 

 however, much deeper than they, and its water is cooler and 

 clearer. It is surrounded by a growth of hickory, elm, syca- 

 more, aiul grape. Its length is less than a fourth of a mile, 

 and its width from 150 to 200 feet. No a(]uatic vegetation 

 was growing in it when it was seined in August. 



LILY LAKE. 



Lily Lake is one of a group of three lakes which lie be- 

 tween the lower end of Wood Slough and <,>uin(y 15ay. They 



