(79) 
30. Little Pickerel. Esox salmoneus, Raf. (2.) A small fish and 
two tadpoles of frogs. 
MOON EYES. HYODONTIDAE. 
31. Toothed Herring. Hyodon tergisus, Le S. (3). Numerous in- 
sects, including a bee, carabid beetle, some aquatic hemiptera, numerous 
larvae of Ephemeridae ; a remarkable crustacean of which but a single 
specimen has hitherto been found in this country (Leptodora hyalina, * 
Lillj.); some rotten wood, elm seeds and other vegetable trash, evidently 
gathered from the drift-wood where one of the specimens had found its food. 
HERRINGS. CLUPEIDAE. ( 6 ‘.) 
32. Ohio Golden Shad. Pomolobus chrysochloris, Raf. (1.) A 
small bony fish and a few fragments of insects. 
33. Gizzard Shad. Hickory Shad. Dorosoma cepedianum, Le S., 
var. heterurum, Raf. (5.) Extremely dirty. Every stomach examined was 
at least half full of mud. The food was chiefly vegetable, consisting largely 
of algae and a few Crustacea, such as would naturally be entangled in the 
vegetation eaten. The objects recognized were a few diptera larvae, Lep- 
todora hyalina, Cypris, Cyclops, masses of Chara, confervoid algae, desmids, 
and vast numbers of diatoms. 
MINNOWS. CYPRINIDAE. {15.) 
Time has failed for the examination of any sufficient number of this 
family, some of the most important genera having been omitted entirely. 
Enough has been learned, however, to show that these fishes live, some 
chiefly on aquatic vegetation (especially algae) and others on insects, of 
which small diptera and their larvae seem to constitute the greater part. 
The section whose teeth are not hooked probably eat vegetable food more 
largely than those with raptatorial teeth, no insects at all having been found 
in the intestines of the five specimens of that section examined. — I found a. 
surprising amount of dirt in the intestines of these herbivorous minnows, — 
too much, I think, to have been taken incidentally. 
34. Stone Roller. Campostoma anomalum, Raf. (1.) Full of dirt 
and confervoid algae. 
35. Blunt-nosed Minnow . Hyborhynchus notatus, Raf. (3.) Full of 
dirt, with fragments of endogenous vegetation, confervoid algae, and many 
diatoms. 
36. Silvery Minnow. Hybognathus argyritis, Crd. (1.) Full of 
sand and an immense number of diatoms, with a few filaments of confervoid 
algae and fragments of other vegetable matter. 
See appendix. 
