46 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY 1. 



XXXV. Genus, LAMPREY, PBTROMYZON, Lamproie. (p. 84.) 



* 104th species, Black Lamprey, PBTROMYZON NIGRUM, Lamproie 

 no-re. (p. 84.) 



Ammoccetes NIGER (Raf.) Jor. 

 Petromyzon niger Grd. 



Description insufficient, but I am unable to find that the common 

 litile Black Lamprey of the West has received any other name. 

 SUPPLEMENT, (p. 85.) 

 tXXXVL Genus, SPRING-FISH, PEGEDICTIS, Pegedicte. (p. 85.) 

 Etheostoma Raf. Gill & Jordan emend. 

 Catonotus Agassiz. 



X lOjth species, Cat's-Eye Spring-Fish, PEGEDICTIS ICTALOPS, Pegedicte 

 ceuil de chat. (p. 85.) 



Etheostoma flabellaris Raf. 

 Description indifferent. The characters indicate a species of Darter, 

 and the eight dorsal spines point to the flahellaris. 



6th genus, ETHEOSTOMA. (p. 85.) 



106th species. Springs Hogfish, ETHEOSTOMA FONTINALIS, Etheostome 

 des fontaines. (p. 86.) 



Etheostoma. flabellaris Raf. 

 Description very good. 



* Eutiiely blackish, tail oval acute, second dorsal over the veut, several rows of 

 teeth. 



A very small species, from 4 to 5 inches long; it is found as high as Pittsburgh. Dor- 

 Hal fins shallow, and distant from each other and the tail. Eyes round and large. 

 Branchial holes small. No lateral line. Mouth oval, teeth white and yellow. It tor- 

 ments sometimes the BuiFalo-fish and Sturgeons upon which it fastens itself. It is 

 never found in sufficient quantity to be used as food. 



tBody conical, with small scales, belly flat, vent medial. Head broad, scaleless, gill 

 covered with a membranaceous appendage and a concealed spine, mouth toothed. Two 

 dorsal tins, the first with simple, soft, semi-spinescent rays. Thoracic fins with five 

 rays. 



This new genus belongs to the family Percidia and has many affinities with the G. 

 Holocentnis, Lepomis, Etheostoma, ^c, but its conical form and many other secondary 

 l)eculiarities distinguish it completely. The name means Fountain-fish. 



I Jaws equal, forehead knobby, eyes elliptical. Body olivaceous with some hlaek irans- 

 vei-sal unequal hroton hands ; a concealed spine on the gill cover ; lateral lino straight; 

 tail elliptical. The first dorsal fin with 8 rays, the second uiih 12, as well as the anal 

 and pectoral fins. 



I have discovered this species in the summer of 1820 near Lexington. It has no 

 vulgar name. Length hardly 2 inches. Head large, brown, convex above, with sev- 

 eral small knobs on the forehead, flat beneath. Eyes as in the Catfishes with oblong 

 eyes, iris gilt brown. Spine of the gill cover concealed under the skin. Teeth small 

 and acute. Pectoral fins large lanceolate. Belly white and flat. Fins hyalin with some 

 brown spots. Five transversal bands. The specific name means cat's eye. 



