4 University of Michigan 



the gravelly creek delta. An old sand dune was cut through 

 by the river, making a portion of each shore high and sandy; 

 elsewhere it was of clay. There was no noticeable aquatic vegeta- 

 tion here or elsewhere in the river through the woods. The station 

 was visited a number of times, but collecting was done only on 

 August 28, 1919. 



Station 26. — Plate II, Fig. 2. Mouth region of a small creek 

 in the south part of the Warren Woods, called Sycamore Creek 

 and entering the Galien River at Station 25. This lower part of 

 the creek winds through a broad, grassy glade. It contained little 

 water at any time that it was visited, which was in June and August' 

 1919. At the latter time, when the collections were made, it was 

 composed of pools that were practically stagnant and were con- 

 nected by narrow, trickling streamlets. The water was turbid.. 

 The bottom was of gravel and firm clay. High overhanging, 

 commonly grassy, banks were present. 



Station jo. — Plate IV, Fig. i. Galien River in Warren Woods 

 in the vicinity of two large trees fallen across the river about fifty 

 feet apart. The place was called Two Bridges by our investigating 

 party. The stream cuts through a large sand bank here leaving 

 a high, sandy clifif on the west side and a piece of sloping sandy 

 shore on the east side; the other banks are of clay. At the upper 

 part of the station was a broad pool, about four feet deep, lying 

 just above the upper tree bridge. The water was shallow between 

 the two bridges, with a marked current and with a sand and gravel 

 bottom; some bowlders and sunken logs were present. The place 

 was visited frequently and a number of collections made in both 

 June and August. 



Station 46. — Plate V, Fig. i. A small, winding stream in a 

 narrow, rather deep ravine in the north part of the Warren Woods, 

 just north of the main road. The stream joins the river near the 

 bridge on the main road. In August this stream was dried up 

 except for a few deep, stagnant pools. The bottoms of these were 



