•fir 



A singular fish, not very common, yet found as far as Pitts, 

 burg-h. It has received the vulgar names of Sailor fish, Flying 

 fish, and Skimback, because, when it swims, its large dorsal fin 

 appears like a sail, and it often jumps or flies over the water 

 for a short distanr e. Length commonly from twelve to sixteen 

 mches, of which the tail, which is very large, includes one 

 fourth, and has 24 rays. Back slightly olivaceous, scales very- 

 large. Fins olivaceous brown, except the abdominal and pec- 

 toral, which are white. The dorsal beginning before the ab- 

 dominal and reaching the end of the anal, the second and third 

 rays are one third of the whole body, the iirst is short and cleav- 

 ing to the second; mouth small, quite terminal at the lower end 

 of the rounded snout; head small, convex above. Pectoral fins 

 w";-h 16 rays. Not very good to tat. Seen only in summer. 



59Lh Species. Mud Sucker. Catosiomiis xcmthopus. Ca- 

 tostome xanthope. 



Diameter one fourth of the length: lateral line straight: sil- 

 very, back olivaceous, head brown above, snout gibbose round- 

 ed: dorsal fin hardly fal.-.: ate with 14 rays, anal lanceolate with 

 8 rays: lower fins yellowish. 



Found below the falls. Length from six to ten inches. It 

 lives in muddy banks, and conceals itself in the mud. Flesh ve- 

 ry soft. Head large, flattened above, mouth large, eyes large, 

 ris silvery. Lateral line hardly raised at the base. Dorsal fin 

 above the abdominal, fins oUvaceous as well as the tail, which 

 has 20 rays. Pectorals with 18 rays. Scales large. 

 4th Subgenus. Teretulus. 



Body elongate cylindrical or somewhat quadrangular, nine 

 ibdominal rays, dorsal fins commonly small, tail equally forked. 



An extensive Subgenus to which belong all the following 

 '.pecies of Lesueur: C. aureoius, C. maci^ole/iidotus, C. lon^-i- 

 ostrumj C. nigricans, C.vittatus, C. maculosus, C. SucettUy 

 uesides the C. teres and C. oblongus of Mitchell. 



60th Species. Black-face Sucker. Cotostomus tnelanofis. 

 Catostome melanopse. 



Diameter one seventh of the length: head squared, blackish 

 above, snout convex obtuse; back olivaceous, sides whitish 

 with scattered black dots, a black spot on the gill cover, and u 



