The Food of Fishes. 
59 
The first of these is doubtless related to the small mouth 
■ — the second to the stout, blunt pharyngeal teeth— -a 
character used in defining the genus. In all the preced- 
ing species the pliaryngeals are set with more slender, 
pointed teeth. 
Eupomotis pallidus, Ag. Pale Sunfish. 
Having but few specimens of this rather uncommon 
species, I have examined the food of but one — enough to 
indicate that it probably agrees closely with the preced- 
ing species. 
This fish, taken in Clear Lake, Ky., had eaten largely 
of small Mollusca— young Unionidae, Planorbis, Amnic- 
ola, etc. These amounted to seventy-five per cent, of the 
food. The remaining elements were Chironomus larvae, 
several small water-beetles, {Hyd^oporus hybridus, 
Cnemidotus Yl-punctatus , and Haliplus, sp.), an un- 
known aquatic pupa and a little pond-weed. 
Centrarchus irideus, Lac. 
This little species is found in considerable numbers in 
ponds and streams in the southern hill-country of Illi- 
nois. My specimens, all taken in July, are from ponds 
and streams in the Mississippi bottoms in Union and 
Jackson counties, and from Cache R. and its tributaries 
in Johnson county. 
Five of the young, from three-fourths of an inch to an 
inch in length, had eaten seventy-one per cent, of Ento- 
mostraca and twenty-one per cent, of larvae of Chirono- 
mus, and, for the rest, about equal quantities of Eph- 
emerid larvae and young Allorchestes, with a trace of 
water mites (Hydrachnidae). 
Thirty-eight per cent, of the food was Cyclops ; Cyprids 
amounted to twenty-one per cent. ; and twelve per cent, 
of Simocephalus completed the ratio of Entomostraca. 
The smallest specimen, three-fourths of an inch long, 
had eaten sixty per cent. Simocephalus and forty per 
cent. Cyclops. 
About a fifth of the food of one specimen, an inch and 
an eighth in length, consisted of minute young Corixas, 
the remainder being about equally Cyclops and Cyprids. 
