Storer’s Synopsis of the Fishes of North America. 519 
1. Ammoceetes bicolor, Lesurur. 
Back and sides reddish; abdomen white ; the color separated by an undulating line.” 
Nape of the neck elevated. Dorsal fins low, separated. On the inside of the upper lip are 
small granules, and at the opening of the throat, small ramified papille. 
Length, (2). 
Connecticut River, Lesurur. 
Ammocetes bicolor, Lesueur, Trans. Amer. Phil. Soc. (New Series), 1. p. 386. 
Ks Wt Mud-Lamprey, Srorrr’s Report, p. 198. 
ce u Colored Mud-Lamprey, Dexay’s Report, p. 383, pl. 79, fig. 248. 
2. Ammoceetes concolor, KirtLanp. 
Body subcylindric, more compressed laterally behind the vent ; transversely marked with 
numerous curved sulcations. Back and sides uniformly of a light olive, or sometimes a 
leaden hue; the belly and throat of a yellowish white ; the fins pale and diaphanous. Ir- 
regular series of dark brown dots are imprinted on the whole length of the sides of the body, 
and more faintly above the branchial openings. Body convex above the branchial openings. 
Dorsal single, commencing over the middle of the ‘body. Mouth semicircular, elongate ; 
lower lip transverse ; nose terminates in a short snout, projecting over the mouth. 
Length, 4 to 5 inches. 
Mahoning and Scioto Rivers, Krrrnann. 
Ammoceetes concolor, Mud-Eel, Blind Eel, Krrttanp, Bost. Journ. Nat. Hist., rv. p. 473, pl. 27, fig. 1. 
3. Ammocetes unicolor, Drxay. 
Color nearly uniform throughout. Dorsal single. Opening to the throat very large, but 
accurately closed by six irregular and ragged subcartilaginous processes, which meet in the 
centre. 
Length, 3 to 5 inches. 
Vermont, THompson. New York, Dexay. 
Ammocetes unicolor, Plain Mud-Lamprey, Dexay’s Report, p. 383, pl. 79, fig. 250, 
