April, 1910. Fishes of Chicago — Meek and Hildebrand. 299 



Genus Fiiiidulus Lacepede. 



Killifishes. 



Body rather elongate, little elevated, compressed posteriorly; 

 head broad flat above, scaly; mouth moderate, lower jaw projecting; 

 jaws each with two or more series of pointed teeth; dorsal and anal 

 fins similar in size; scales large. 



a. Dorsal fin long, its rays 13 or 14; scales small, 43 to 45 in lateral 

 series; color olivaceous with numerous dusky crossbars. 



menona, 299 

 aa. Dorsal fin short, its rays 7 to 9; scales larger, 28 to 36 in lateral 

 series. 



b. Sides with numerous lengthwise streaks in female, the male 

 with dark crossbars. dispar, 299 



bb. Sides with a single black band from head to tail; males wit^i 

 obscure crossbars. notatus, 300 



Fundulus diaphanus menona (Jordan &- Copeland). Menona Top 



Minnow. 



Head 3.5 to 3.9; depth 4.5 to 5.3; D. 13 or 14; A. 11; scales 43 

 to 45. 



Body rather slender, not much compressed; head flat above; 

 mouth small, maxillary 3.6 to 4.0 in head; lower jaw slightly pro- 

 jecting; diameter of eye 3.0 to 3.5 in head; snout 2.9 to 3.7 in head; 

 teeth in jaws, curved, the outer ones scarcely enlarged; dorsal in- 

 serted in front of ventrals; caudal fin rounded; cheeks and opercles 

 covered with large scales. 



Color of males light olivaceous, spotted with dusky on back and 

 sides; 15 to 20 dark transverse bars on each side, broader than the 

 silvery interspaces; females with dark bars shorter and narrower, the 

 interspaces wider than the bars. 



Length 3 inches. 



This fish inhabits small streams and lakes with clear water from 

 Wisconsin and Illinois to Maine. 



Des Plaines River, Libertyville, Illinois; Wolf Lake, Roby, In- 

 diana; Lake George, Indiana; Lake Michigan, Whiting, Indiana. 



Fundulus dispar (Agassiz). 



Head 3.5 to 4.3; depth 3.5 to 4.3 ; D. 7; A. 9or.io; scales 34 to 36. 



Body elongate, rather robust; head flat above; mouth small, the 

 lower jaw scarcely projecting; maxillary 2.8 to T).T) in head; diameter 



