49 



bove the head. Abdominal and anal fins white. Pectoral and 

 abdominal fins oboval, with 12 rays. Tail with 24rays. 



42d Snecies. Yellow Shiner. Luxilus interrufiius. Lux- 

 ile jaunatre. 



Diameter one sixth of total length: yellowish olivaceous a- 

 bove, silvery beneath, rufous brown above the head, a rufous 

 line from the dorsal to the tail, two straight and separated half 

 lateral lines, the anterior one above the posterior: pectoral fins 

 reaching the abdominal. Dorsal with 10 and anal with 9 rays. 



A small species, only three inches long, called Yellow Chub 

 or Sbiuer. Seen in the Ohio. Sides opaque, with violet shades. 

 Iris silvery, mouth large, lips very apparent. Fins yellowish, 

 pectorals with 16 rays, caudals with 24. 



XVII Genus. Chubby. Semotilus. Semotile. Ukl\ 



Difference from Minnilus. Vent posterior or nearer to the / 

 tail. Dorsal fin posterior, opposite to the vent and behind the ""^"^^ 

 abdominal fins. Mouth large and w4th lips. Scales rathar 

 large. Preopercule angular. 



43d Species. Bigback Chubby. Semotilus dorsalis, Semo- 

 tile dorsal. 



Diameter one fifth of total length: silvery, back olivaceous 

 with some black dots, and raised; head brown above, a crenula- 

 ted keel above each eye: lateral line upwards at the base: tail 

 brown, with a black spot at the base and another before it. Dor- 

 sal fin with 8 rays and a large brown spot at the anterior base. 

 Anal fin with 9 rays. 



It is found in the Kentucky, and several other rivers. Vul- 

 gar names, Big-back Minny or Chub, Skimback, Sec. Length 

 from three to six inches. Iris gilt brown. Fins olivaceous, pec- 

 toral fins with 12 rays, trapezoidal not reaching the abdominal. 

 Tail with 24 rays, end pale, base with a round black dot, and a 

 smaller one before it on the body, when the lateral line termi- 

 nates. Head separated from the back by a suture connected 

 ^vith the opercule, back large convex higher. 



44th Species. Bighead Chubby SeJiotilus ce/ihaius. Se- 

 notile cephale. 



Diameter one fifth of the total length: silvery, back brownish, 

 lateral line raised upwards at the bascj fins fulvous, the pecto- 



