April, 1910. Fishes of Chicago — Meek and Hildebrand. 335 



Aplodinotus grunniens Rafinesque. Craoker; Fresh-water 



Drum; Sheepshead; White Perch. 



Head 3.3 to 3.6; depth 2.7 to 3.1 ; D. viii or ix — 1,25 to 31; A. 

 II, 7 ; scales 50 to 56. 



Body elongate, compressed, the dorsal region elevated; head sub- 

 conical, with blunt snout; interorbital space slightly convex, 3.2 to 

 3.7 in head; snout 3.1 to 3.7 ; mouth subinferior, the margin of upper 

 lip below the eye; maxillary reaching middle of the eye; lower jaw 

 the shorter; gill rakers stout and shortish; cheeks and opercles 

 scaled; spinous dorsal continuous with soft portion; scales strongly 

 ctenoid; lateral line complete, much arched anteriorly and parallel 

 with dorsal outline. 



Color plain silvery gray on sides and back, white on belly; fins 

 plain except for smoky gray on membranes. 



Length 2 to 4 feet. 



This fish inhabits the larger streams and lakes from the Great 

 Lake Region to Georgia, Texas, and Yucatan. 



Lake Michigan, Millers, Indiana; Lake Michigan, Pine, Indiana; 

 Deep River, Liverpool, Indiana. 



Family Cottidse. 



The Sculpins. 



Body moderately elongate, fusiform; head large, depressed; body 

 without scales, usually w4th few prickles or scale-like plates; mouth 

 broad; teeth on jaws villiform; premaxillary protractile; gill mem- 

 branes broadly connected, often joined to the isthmus; dorsal fins 2, 

 slightly connected; ventral fins with one spine and three or four soft 

 rays; pseudo branchiae present; air bladder usually absent; pyloric 

 coeca 4 to 8 ; lateral line present. 



a. Ventrals with a concealed spine and 4 soft rays. Cottus, 335 

 aa. Ventrals with a concealed spine and 3 soft rays. Uranidea, 337 



Genus Cottus (Artedi) Linnaeus. 



Miller's Thumbs. 



Body fusiform, without scales; prickles, when present, not scale- 

 like; head broad; mouth rather large, with villiform teeth on jaws; 

 angle of preopercle with a spine, its tip curved upward; gill mem- 



