APRIL, 1910. FISHES OF CHICAGO MEEK AND HILDEBRAND. 325 



horizontal, maxillary reaching slightly past front of orbit; cleft of 

 mouth 2.9 to 3.7 in head; snout blunt, slightly overhanging the mouth, 

 3.3 to 4.2 in head; eye 3.2 to 4.0 in head; spinous and soft dorsals 

 slightly joined; separation of ventrals usually a little less than their 

 width at base; gill membranes narrowly connected; cheeks naked 

 or with trace of scales on upper portion ; breast usually naked ; nape 

 scaled or not; lateral line complete or nearly so. 



Color pale-olive or straw color; back much tessellated with brown; 

 sides with numerous W-shaped or quadrate blotches; head speckled 

 above, mostly black in males; fins barred. 



Length 2> inches. 



This species ranges from the Assiniboin to Colorado and eastward. 



Fox Lake, Illinois; Fox River, McHenry, Illinois; Pettibone 

 Creek, North Chicago, Illinois; Ravine, Glencoe, Illinois; Chicago 

 River, Edgebrook, Illinois; Salt Creek, Lyons, Illinois; Thorn Creek, 

 Thornton, Illinois; Hickory Creek, Alpine, Illinois; Hickory Creek, 

 Marley, Illinois; Hickory Creek, New Lenox, Illinois; Wolf Lake, 

 Roby, Indiana; Lake George, Indiana. 



Boleosoma camurum Forbes. BLUNT-HEADED DARTER. 



Head 3.9 to 4.3; depth 6.5 to 7.2; D. vin to x 10 or n' A. i, 7 

 or 8; scales 52 to 60. 



Body elongate, slender, somewhat compressed; head short, nar- 

 row, snout decurved; interorbital flat; mouth small, its gape hori- 

 zontal ; maxillary reaching to front of pupil ; cleft of mouth 3.1 to 



FIG. 70. BLUNT-HEADED DARTER. 



Boleosoma camurum Forbes. (From Forbes and Richardson.) 



3.8 in head; snout blunt, 3.8 to 4.5 in head; eye 3.3 to 4.0; spinous and 

 soft dorsals separated by a distance about equal to diameter of the eye; 

 separation of ventrals less than their width at base ; gill membranes 

 not broadly connected; cheek opercles and breast fully scaled; nape 

 with a median naked strip; ventral surface covered with ordinary 

 scales; lateral line developed on about half the scales; pyloric caeca 3. 

 Color much as in the preceding, being less finely tessellated and 



