128 The Ohio Journal of Science [Vol. XVI, No. 4, 



that had to be scooped out to obtain the proper bottom. The 

 eggs He in the apex of the depression. They are approximately 

 one millimeter in diameter and they blend so well in color with 

 the sand as to make them rather hard to detect. The large 

 nests were confined to a fairly well defined zone which began 

 about ten feet from the water's edge and extended outward to 

 a line between eighteen and twenty feet from shore. Most of 

 them were in water which was from eleven to fourteen inches 

 deep. A few were in fifteen inches of water. 



In describing the location of the nests reference will be made 

 to the outline sketch of the cove shown in Figure 4. The larger 

 rings represent the large nests and the smaller rings indicate 

 the small nests. The letters are for convenience in description 

 and are explained in the text. 



On July 5, a group of large nests was found on the eastern 

 side opposite the point A on a sandy bottom with some vegeta- 

 tion. This group lay approximately fifteen feet from shore on 

 the border line of the mucky region at the inner end of the cove. 

 Some of these nests are shown in Figure 3. Between A and the 

 Lake Laboratory landing (L) fifteen other nests were scattered. 

 These were likewise on a sandy bottom and for the most part 

 lay singly. Three of these are to be seen in Figure 2. There 

 were also some large nests near the south side of the landing, 

 but they were not counted at this time. 



From July 12 to 16, a survey was made of the whole eastern 

 shore. On this side all the nests were in the strip of sandy and 

 pebbly bottom, previously mentioned, which was only sparsely 

 covered with vegetation and extended for twenty-five to thirty 

 feet from shore. The conditions were in general like those 

 shown in Figure 2. Between the above dates 138 nests were 

 counted from the landing to the point H, a distance of about 

 a hundred and fifty yards. No nests were found beyond H. 



By July 27 there were no occupied nests north of the Lake 

 Laboratory landing and most of the nests previously seen 

 south of this were no longer in use. However, there were some 

 fresh nests among the old ones near H and others were now 

 found as far down as S, at which point there are the remains 

 of an old scow. The total number of nests for the region L to 

 S was thirty. Of these eleven were between H and S. From 

 S to M there was a firm, sandy bottom, but there were no nests 



