large one between the dorsal and caudal fins: lateral line straightj 

 dorsal fin with 1 4 rays, anal with 9 rays. 



A singular species seen at the falls. It is rare and called 

 Spotted Sucker or Black Sucker. Length from four to six 

 inches; body cylindrical, flattened beneath as far as the vent. 

 Head fiat above, blackish there and in the fore part. Mouth 

 almost terminal with thick whitish lips, the lower one shorter 

 and thicker, a few small black spots on the sides of the head 

 and a large one on the preopercule. Gill cover silvery. Eyes 

 black, iris brown with a gold ring. Back of a rufescent colour 

 with gold shades. A very large black patch above the anal fin 

 before the tail. Sides pale with small unequal black dots, bel- 

 ly whitish." Fins coppery, the pectoral elliptical elongated with 

 I8 rays, the anal elongated reaching the tail, the dorsal broad 

 and opposed to the abdominal. Tail with 20 rays. Scales ra- 

 ther larffe nervose radiated. 



o 



61st Species. Bl.\ck-back Sucker. Catostomus melanotiis, 

 Catostome melanote. 



Diameter one six'h of the length: bluish black above, whitish 

 beneath; head convex, snout obtuse: lateral line straight: dor- 

 sal and anal fins with nine rays. 



Seen only once at the falls. Length six inches, body nearly 

 cylindrical. Mouth rather inferior, lips thick and somewhat 

 gristly. Iris silvery. Scales pretty large. Fins whitish, the dor- 

 sal and caudal a Ittle rcdish. Pectoral fins elliptical with 16 

 rays- Tail 20. Dorsal fin trapezoidal, opposed to the abdom- 

 inal, the first ray shorter. Anal elliptical obtuse. Vulgar names 

 Black Sucker and Blue Sucker. 



62d Species. Rough-head Sucker. Catostomus fasciolaris. 

 Catostomus fascie. 



Diameter one sixth of the length: brown above, white be- 

 neath, sides with small transversal black lines: head sloping, 

 tuberculated above, snout obtuse: dorsal fin longitudinal reach- 

 ing the end of the anal fin, lateral line straight. 



I have not seen this species, but describe it from a dra.ving of 

 Hr Audubon. It is found in the lower part of the Ohio. Vul- 

 gar names Rough-head Siicker, Pike Sucker, Striped Sucker. 

 Length about eight inches, body cylindrical tapering behind. 



