114 ICHTHYOLOGIA OHIENSIS 



Catostomous anonymous Lesueur in Journ. Ac. Nat. 

 Sc. of Philadelphia, Vol. i, page iio. 



[57] A singular fish, not very common, yet found 

 as far as Pittsburgh. 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 

 distance. Length commonly from twelve to sixteen 

 inches, of which the tail, which is very large, includes 

 one fourth, and has 24 rays. Back slightly oliva- 

 ceous, scales very large. Fins olivaceous brown, 

 except the abdominal and pectoral, which are white. 

 The dorsal beginning before the abdominal and reach- 

 ing the end of the anal, the second and third rays 

 are one third of the whole body, the first is short 

 and cleaving to the second; mouth small, quite ter- 

 minal at the lower end of the rounded snout; head 

 small, convex above. Pectoral fins with 16 rays. 

 Not very good to eat. Seen only in summer. 



59th Species. Mud Sucker. Catostovius xanthopus. 

 Catostome xanthope. 



Diameter one fourth of the length : lateral line 

 straight: silvery, back olivaceous, head brown above, 

 snout gibbose rounded : dorsal fin hardly falcate 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 very soft. Head large, flattened 

 above, mouth large, eyes large. Iris silvery. Lat- 

 eral line hardly raised at the base. Dorsal fin above 

 the abdominal, fins olivaceous as well as the tail, 

 which has 20 rays. Pectorals with 18 rays. Scales 

 large. 



