172 REPORT OF STATE GEOLOGIST. 



bb. Pectoral spine rough in front, grooved behind. 



nocturnus, p. 172. 

 aa. Jaws nearly equal. 



c. Pectoral spine smooth in front, grooved behind. 



gyrinus, p. 173. 

 cc. Pectoral spine with small teeth in front, stronger, re- 

 curved ones behind. miurus, p. 173. 

 ccc. Pectoral spine with the teeth in front short and recurved, 

 the hinder ones weak. exilis, p. 174. 

 AA. Premaxillary band of teeth narrowed abruptly behind, then ex- 

 tending back to a point. flavus, p. 174. 



NoTURUS ELEUTHERUS Jordan. 



Jordan and Gilbert, 1882, 8, 99 ; ScJnlbeodes eleutherus, Eigenmann 

 and Beeson, 24., '93, 81. 



Body, stout; head, broad and Hat, contained in the length of body 

 three and seventy-five one-hundredth times; eye, small, in length of 

 head, five and one-half times ; snout projecting considerably beyond the 

 lower jaw ; anal rays, thirteen ; pectoral spine about half the length of 

 head, its front with small recurved teeth, its hinder border with strong 

 recurved teeth. The color is brownish, with two or three darker bands 

 across the back. In 7, 42, the color is stated to be nearly plain brown- 

 ish, with numerous small dots above. 



This species resembles N. miuru.< so closely that there is much doubt of 

 its distinctness. (11, '85, 802.) White River, Indianapolis. 



The length is given at four inches. Professor Kirsch reports (4, '94, 

 36) that he has taken a number of specimens in Eel River, in North- 

 eastern Indiana. Eigenmann has found it at Gosport, in Owen County. 

 (24., '93, 81.) 



N0TURU8 NOCTURNUS Jordan and Gilbert. 



Jordan and Gilbert, 1886, 23, 6 ; 1891, 4, 138. 



Body rather elongated and slender ; depth in length, about five and 

 one-half times ; head moderate, flat ; its width in length of body, five 

 times; tapering from the opercles to the rounded and projecting snout; 

 snout, in the head, three to three and five-tenths times ; dorsal 

 rays, I, 6; anal rays, 15 or 16; its base about equal to the length 

 of the head ; pectoral spine weak ; its length in the head close to 

 two and one-fourth times ; rough in front, grooved behind ; adi})Ose fin 

 passing into the caudal almost without notch ; color almost uniform 

 brown, paler below ; no stripes. Length, two to three inches. 



Originally described from the rivers of Arkansas, where it appears to 

 be abundant. More recently it has been taken at Evansville, Ind. (4, 

 1891, 138.) 



