FISHES OF HOUGHTON COUxNTY. 17 



Chrosomus erythrogaster. —^lany m shallow water near shore. A 

 large, compact sclwol was seen in three feet of water. 



Rhinichihys atronasus lunaius. — ^^C'hiefly in the shallow water near 

 shore. 



Couesius plumheus. — Three small siiecimens. 



Leudscu.'< ncogcus. — One taken. 



Caiosto)nus catosto^nus. — About a dozen small ones were taken and 

 one comparatively large specimen, nearly a foot long, Avas found sucking 

 on the submerged part of a floating log en the wood freshly bared ])y the 

 stripping oE of a portion of the bark. 



Eucalia inconstans. — One taken. 



Micropterus salmoides. — Small specimens under four inches in length 

 were common in a few inches of water near shore. 



Perca flavescens. — Small specimens under three inches in length were 

 common. They were confined to the deeper part of the shoal in two or 

 three feet of water and were found in compact schools. 



The first three species of fish mentioned in this list were closely 

 associated and tended to school together. 



Station 16. A stretch of shore different from that of any other ])art 

 of the lake is found at this station (Plate IV). The beach is unusually 

 l)road with low bushes scattered over it, and the shoal is also peculiar in 

 that the bottom is covered with large pebbles over which no fish were 

 found. The only place where fish were seen was in a shallow beach 

 pool which was connected with the lake by a short, narrow channel. 

 This little bay is scarcely more than a square yard in area and only an 

 inch or so in depth. Many small fish were observed, and as the writer 

 approached, they began to hasten through the little channel to the lake. 

 A collection of these fish contained representatives of Semotihis at- 

 romaculatus, Rhinichthys atronasus lunatus, Couesius plumheus, Eucalia 

 inconstans and Lepomis cyanellus. All were small individuals of their 

 species, and the Semotihis was most abundant, only one of each of 

 the last four species l)eing taken. 



Station 13. As shown on the map, this station is at the enil of a 

 little bay. There is a diversity of conditions, but the whole region 

 is a shoal with more aquatic vegetation than any of the stations yet 

 described. In places the water reaches a depth of about four feet. 

 The bottom is mostly hard and sandy, but close to the south end of the 

 bay there is a thin layer of humus over the sand. Plate V shows a 

 part of the eastern portion of the bay. 



Rushes were abundant, and there was a good sized ]xitch of Brasenia 

 Shreberi. 



The following inxcrtebrates were found in this habitat: 



SpongiUa lacustris (Linn.) and Spongilla fragilis, Leitiy. — These two 

 3 



