264 REPORT OF STATE GEOLOGIST. 



crevices of rock, and under masses of weeds or sunken logs in the deepest 

 waters, and remains dormant until spring. 



Forbes {14, No. 3, 4) found that specimens from one to two inches 

 long had eaten a small quantity of entomostraca ; the remainder of the 

 food consisted of insects. As the size increased, the insect food increased, 

 and soon fishes appeared in the stomachs. When from three to four 

 inches long, they mostly drop insects, devour more fishes, and betake 

 themselves to crustaceans again, now mostly the Amphipods and Isopods. 

 Corixas amounted to fifty per cent, of the food of the young. The adults 

 devour crayfishes and fishes ; among the latter are specimens of Noturus. 



MiCROPTEKUS SALMOIDES (LaC). 



Large-moxdhed Blade Bass. 



Jordan and Gilbert, 1882, 8, 484; Jordan, 1884, 12, 401, pi. 147; 

 Henshall, J. A., Booh of the Black Bass. 



Body compressed ; moderately deep. Depth in the length about three 

 times ; the young more slender. Head in the length about three and 

 one-fourth times. Mouth very large, the maxillary bone extending back 

 to or beyond the hinder border of the eye. Lower jaw projecting. 

 Cheeks and opercles scaled. Lateral line arched upward. Scales, 8-65 

 to 70-15. Dorsal fin X, 12 or 13 ; anal III, 10 or 11. Middle of the 

 tongue with a patch of small teeth ; olive above, sometimes quite dusky, 

 at other times with some tints of reddish ; pale below. Young with a 

 dark lateral band, a spot on the opercle, and three horizontal stripes on 

 the cheeks. Some of these markings may be retained into adult life. 

 The young are never cross-barred. Length said to become as much as 

 two and one-half feet. 



Eastern North America from Mexico to British America. A resident 

 of all Indiana streams. Carroll County (23, '88, 49); Marshall County 

 (23, '88, 55) ; Clark and Ohio counties (23, '88, 56) ; Franklin County 

 (5, No. 2, 7) ; Marion County (1, '77, 376) ; lakes of Laporte County, 

 St. Joseph's River, Maumee River, Tippecanoe River, Kankakee River 

 and White River (1, '77, 44) ; Lawrence County (33, '84, 204) ; Greene 

 County (23, '84, 209); Kankakee River at Plymouth U, '88, 156); 

 Marshall and Whitley counties (4-, '88, 159) ; Gibson, Knox and Posey 

 counties (4, '88, 164) ; Evansville (4, '88, 166) ; Owen County (4, '88, 

 166); Vigo County (10, '95) ; Eel River basin (4, '94, 39); 'Winamac 

 and New Harmony. 



The habits of this species are greatly like those of the preceding. The 

 excellent work of Dr. Henshall ought to be consulted by all desiring 

 further information. The food habits, as ascertained by Forbes, are not 

 greatly diflferent at any age from those of the small-mouthed bass. 



