AQUATIC LIFE I39 



The temperature at the lower outlet was 41.3 F. The tempera- 

 ture around the shelf where the water is more stagnant than 

 at the outlet was 60.8 degrees F. 



BeimilIvEr's Cove, Cedar Point. 

 July 5, 1916. 



A strip of shore water 100 feet long and 30 feet wide along the 

 northwest corner of the Cove was examined for aquatic forms. 

 The temperature of the water was, 27 degrees C, and this was 

 constant throughout the slight depth of 2 to 3 feet* 



The flora found consisted of willows along the shore, Myrio- 

 phyllwn and Ceratophyllum just below the surface, roots of grasses 

 and trees along the shore, and reeds throughout the space covered. 



On the surface of the v/ater along the shore were found adult 

 mayflies and midges while adult Lepidoptera were flying over the 

 water. There was an abundance of vegetation near the shore and 

 this accounts for the mucky bottom at the east end of the Cove. 

 Leeches (Glossiphonia) were found to be numerous and Asellus 

 were abundant. 



In the mud and under the surfaces of leaves and in among the 

 roots along the shore the Gammaridae were numerous. Also found 

 large egg masses of Yolyzoa, pupae cases, Oniscus, leeches, and 

 snail eggs. 



On the reeds which were all growing from a sandier bottom, 

 leeches, water mites, snails, polj'^zoans and snail eggs were found. 

 On all vegetation in this locality polj^zoans were found in abundance. 

 Gamniaridae most numerous on myriophyllum and algae. 



On the bottom along the northeast side of the Cove a few 

 mussels {Lampsilis) , numerous snails at a depth of 2^/2 feet; and 

 sunfish nests at 2 to 3 feet were found; also a few crayfish. 



The air temperature during the collecting period was 27 degrees 

 C. and the water temperature 25 degrees. 



Sunfish Nests — Beimiller's Cove. 

 July 5, 1916. 

 The sunfish build their nests along the shore in shallow water 

 where the bottom is unusually sandy and free from vegetation. 



The nest consists of a saucer-like depression having the bottom 

 lined with small pebbles. These pebbles may be the result of the 

 fanning, described later on, or they may be the result of wave 

 action. 



