116 
BULLETIN OF THE UNITED STATES FISH COMMISSION, 
16. Fundulus diaphanus (Le Sueur). S. 
Color very dark ; body with 14 narrow, black cross-bands. D. 13 ; A. 19. One 
specimen. 
17. Gambusia patruelis (Baird & Girard). J., D., W., S., P. 
Yery common. 
18. Chologaster avitus Jordan & Jenkins. J. 
Very common in the Jericho Canal; not seen elsewhere. 
19. Umbra pygmaea (De Kay). J. 
In view of the constant differences in pattern of coloration shown by the eastern 
form, the latter may perhaps stand provisionally as a distinct species. The characters 
are well given by Blatchley (Proc. Ac. Nat. Sci. Phila., 1885, 12). 
20. Lucius americanus (Gmelin). J., S. 
Common. 
21. Lucius reticulatus (Le Sueur). J., S., P. 
Common. 
22. Aphredoderus sayanus (Gilliams). J., D.,W. 
Common. D. Ill, 10 ; A. 11, 6 ; scales 39 to 42 ; 23 scales before dorsal ; color very 
dark ; a pale streak along lateral line; a dark streak above base of anal ami parallel 
with it. 
Specimens from Delaware Eiver have scales 47 to 48, 24 before dorsal, but are 
otherwise similar. 
Specimens from Illinois Eiver have the color much paler, the streak above anal 
obsolete, and the scales very much smaller, about 58 in a lengthwise series; 36 before 
dorsal. These certainly form a tangible variety or subspecies, gibbosus Le Sueur. 
[Aphredoderus gibbosus Le ^\iQnv=8ternotremia isolepis IS (d\&o\\ = Aphredoderus cooh- 
ianus Jordan — Asternotremia mesotrema Jordan. The last three synonyms represent 
different stages of growth). Other specimens, Wabash River, show 48 to 51 scales, 
and are apparently intermediate between gibbosus and sayanus. 
23. Centrarchus macropterus (Lac6pMe). J. 
D. XII, A. YII ; scales 41. Common. 
24. Pomoxis sparoides (Laodpfede). J. 
Common. 
25. Acantharchus pomotis (Baird). J. 
Two specimens ; scales 45. 
26. Enneacanthus obesus (Baird). J., W. 
Common. Compared with the next species [E. gloriosus or simulans, from Tren- 
ton, N. J.), E. obesus is more elongate, the forehead above eye less depressed, the 
lateral line less arched, the eye smaller, the black lateral bands very distinct. The 
most striking character is in the size of the opercular spot. This, in obesus, is as wide 
as long in the adult, and four-fifths diameter of eye. In gloriosus it is longer than 
wide, and little more than half diameter of eye. Both species have pale spots on the 
body and fins, but in obesus those on the body are smaller and farther apart. 
