60 



A very doubtful species seen by Mr. Audubon. It tomes 

 sometimes in shoals in March, and soon disappears. On- 

 ly taken with the seine, not biting at the hook; vulgar name 

 Brown Sucker. The mouth is very remarkable, being broader 

 than the head, somewhat projecting on the sides. Length one 

 foot. The head reseml>les that of Cat-fish, but has no barbs. 

 Is it a peculiar genus ov/ing to the mouth and pectoral spine? It 

 might be called Eurystonuis, The yellow colour covers the 

 forehead and reaches to the anal fin. Dorsal opposed to the ab- 

 dominal and trapezoidal, pectorals elliptical yellow. 

 5th Subgenus. Decactylus. 



Body nearly cylindrical, abdominal fins with 10 rays: tail e- 

 qually forked. 



Besides the two following species, the C. bostoniensis and 

 C. hudsonius^ must be enumerated here. 



66th. Species. Pittsburgh Sucker. Catostomus diiquesni. 

 Catostome duquesne. 



Diameter one fifth of the length, whitish; lateral line curved 

 towards the back: anal fin with nine rays extending to the tail: 

 dorsal with 14 rays and trapezoidal. 



C. duquesni Lesueur J. Ac. Nat. Sc. v. 1, p. 105. 



This species has been pretty well described by Lesueur: see 

 his description. Length from 15 to 20 inches: good to eat, 

 found in the Ohio as far as Pittsburgh: vulgar name White 

 Sucker. 



i 67th Species. Loxg Sucker. Catostomus elongatas. Catos- 

 tomus allonge. 



Diameter one seventh of the length; brownish; lateral line 

 nearly straight, snout and opercules tuberculated: dorsal fin 

 with 32 rays, long, falciform and raised anteriorly. Anal 

 fin small with 8 rays. 



C elongatus Lesueur J. Ac. Nat. Sc. v. 1, page 103. 



It is found in the Ohio as far as Pittsburgh, and called Brown 

 Sucker, length from 20 to 25 inches. Head small cuneiform 

 above: Scales large. Good to eat. See Mr. Lesueur's des- 

 cription. 



