272 REPORT OF STATE GEOLOGIST. 



Percina caprodes (Raf.). 

 Log-perch; HogmoUy; Hog-fish. 



Jordan and Gilbert, 1882, 8, 499 ; Jordan, 1884, 12, 417. 



Body elongated and a little compressed. Depth in the length six 

 times. Head broad between the eyes. Snout pointed, piglike, pro- 

 jecting beyond the mouth, which is, therefore, inferior ; it is also small, 

 the maxillary reaching only two-thirds the distance to the front of the 

 eye. Gill- membranes distinct from each other and from the isthmus. 

 Paired fins rather short, falling far short of the vent. Scales small, 

 12-92-19 ; the middle line of the belly with a row of scales enlarged 

 and furnished with a few coarse teeth. These scales may continue on 

 to the breast. -They are liable to be shed and be wanting. Cheeks and 

 opercles scaled. Yellowish green, the back and sides crossed by about 

 fifteen dusky bars alternating with which are other less conspicuous bars. 

 A dark round spot at the base of the caudal rays. Dorsal and caudal 

 fins mottled and barred. Other fins mostly plain. Length six to 

 eight inches. 



Gi-eat Lakes and south to the Gulf. Carroll County (23, '88, 51); 

 Northern Indiana (1, 77, 53, 67) ; Clark County (23, '88, 56); Frank- 

 lin County (5, No. 2, 8); Monroe County (1, '85, 411); Marion County 

 (1, '77, 44, 375); Lower Wabash (1, '77, 44); St. Joseph's River (i, '77, 

 44, 53) ; East Fork White River (23, '84, 204); Cass County (4, '88, 

 159); Knox, Gibson and Posey counties (4, '88, 164); Spencer, Owen 

 County (4, '88, 167); Vigo County (16, 96); Calumet and Vermillion 

 rivers. Ills. (14, No. 1, 36); Eel River Basin (4, '94, 39): Decatur 

 County (Shannon). 



This curious species lives in clear and rapid streams, where there is a 

 gravelly bottom. Forbes (14-, No. 3, 23) has studied its food. This 

 appears to be made up of crustaceans, entomostraca and amphipods. 

 One specimen had eaten a few small mollusks. 



Genus ETHEOSTOMA Rafinesque. 



Premaxillary not protractile, the skia of the upper lip passing in the 

 midline into that of the forehead. Mouth large or small, seldom in- 

 ferior. Teeth on the vomer. Maxillary not closely bound to the pre- 

 orbital by skin. Body usually more or less compressed. Scales cover- 

 ing whole of the body. 

 A. Lateral line running backward to base of caudal fin. 



1. Mid-ventral Hue wiih a row of enlarged scales ; or, if these 

 have fallen away, with a naked strip, 

 a. Palatine teeth present. 



b. Gill-membranes scarcely united across the isthmus. 



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