REVIEW OF RAFINESQUE ON AMERICAN FISHES. 31 



* XVIII. Genus, PALLFISH, Rutilus, Rutile. (p. 50) 



= Leuciscus Klein, 



t46th species, Silverside Fallfish, RUTILUS PLARGYRUS, RutUc plar- 

 gyre. (p. 50.) 



LuxiLus CORNUTUS (probably). 



Eafluesque's account applies about equally well to Luxilus cornutus 

 and Cyprinella analostana Grd. I prefer to follow Dr. Kirtland and 

 writers generally in identifying it with the preceding species. The name 

 Plargyrus is not available for any of our genera of Cyprinidce. As Cypri- 

 nus rutilus L. is stated to be the type of Rutilus Eaf., it is the type of 

 that genus, and the provisional name Plargyrus is unnecessary. 



t 47th species, Baiting Fallfiish, RUTILUS COMPRESSUS, Rutile appat. 

 (p. 51.) 



Not yet satisfactorily identified. It is probably not Leuciscus com- 

 pressus of Kirtland. It may have been based in part on Nototropis 

 rubrifrons (Cope.) 



$ 48th species, Round-Nose Fallfish, RUTILUS AMBLOPS, Rutile amblopse 

 (p. 51.) 



ISTocoMis AMBLOPS (Raf.) Cope & Jordan. 



Ceratichthys hyalinus Jordan, Man, Vert. (dOt of Cope). 



Description rather indefinite. AsGirard has identified it with a species 

 of Ceratichthys, I refer it to a member of that genus common at the 



* Difference from Minnilus : Vent posterior, nearer to the tail. Abdominal fins with 

 nine rays. Mouth large and with lips. Scales large. 



I call this genus Rutilus, in the supposition that the Cyprinus rutilus may be the 

 type of it; if it should be otherwise, it may be called Plargyrus. 



t Diameter one-fifth of total length; silvery, back with the dorsal, pectoral, and 

 caudal fins olivaceous ; lateral line curved downwards; snout truncate; mouth almost 

 vertical. Dorsal and anal fins with 9 rays. 



Length from 4 to 6 inches ; vulgar names :— Silverside, Shiner, White Chub, &c. 

 Common in the streams of Kentuciiy, Mouth large, upper jaw almost vertical, yet 

 longer than the lower. Iris white. Pectoral fins with 14 rays, reaching almost the 

 abdominals, which are oboval and white. Tail forked as usual with 24 rays. Scales 

 large, 



t Diameter one-seventh of total length; silvery, back fulvous, sides compressed, 

 lateral liue straight, raised upwards at the base, snout rounded, vwulh hardly diag- 

 onal, nearly horizontal. Dorsal and anal fins with 9 rays. 



A small fish from 2 to 4 inches long, called Fall-fish, Bait-fish, Minny, &c. It is 

 found in the Alleghany Mountains, iu the waters of the Monoagahela, Kenhaway, and 

 even in the Potomac. The name of Fall -fish arises from its being often found near 

 falls and ripples. Body more compressed than in the other species ; as much so as in 

 the genus Minnilus. Scales large ; lips a little fleshy ; iris silvery-gilt ; fins transpar- 

 ent ; the pectoral with 14 rays, and not reaching the abdominal ; tail with 32 rays, 



$ Diameter one-sixth of total length; silvery, head fulvous above, snout round; 



