494 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



770. V. camura (Forbes) Jor. 



Body slender, elongate, with long caudal peduncle. Back somewhat 

 elevated. Head small, rather slender, the snout shorter than eye, 

 strongly decurved. Mouth inferior, horizontal, small, the maxillary 

 extending to the middle of the eye. Gill-membranes little connected. 

 Cheeks, opercles, and breast closely covered with rather large scales; 

 median line of neck naked; opercular spine strong; scales moderate; 

 lateral line quite short, nearly straight, reaching to the middle of the 

 sp nous dorsal, developed on 20 to 30 scales. Fins small, the dorsals 

 well apart; first dorsal larger than the second, which is larger than the 

 small anal. Coloration as in Boleosoma, olivaceous, the back spotted 

 and tessellated; sides with about ten irregular spots; a dark spot on 

 opercles. Head spotty above; a black line across the muzzle; no bar 

 below eye ; dorsals and caudal fin finely barred. Head 4^; depth 5 J. 

 D. X-10; A. I, 8; scales 5-56-10. L. 2| inches. Rivers of Illinois. 



(liolcosoma camura Forbes, Bull. Ills. Lab. Nat. Hist, ii, 40, 1878.) 



771. V. cliBorosoma Hay. 



Body slender, compressed, the dorsal region much arched. Caudal 

 peduncle long and slender, the body abruptly contracted at the vent. 

 Head small, convex in profile. Cheeks and opercles scaled. Breast 

 scaled or naked. Dorsals separated by a distance equal to half the head, 

 about equal to each other, larger than the anal. Lateral line developed 

 on 4 to 20 scales. Greenish yellow, with many blotches and zigzag 

 markings of brown; a row of about 10 of these blotches along each side, 

 most distinct on caudal peduncle; about 8 square brown dorsal spots. 

 Top of head, opercular spot, and subocular spot, black. A black streak 

 from eye to snout. Head 4; depth 5]> D. IX-11; A. I, 7 or I, 8; Lat. 

 1 50 to 00. L. 2 inches. Eastern Mississippi; apparently not different 

 from the preceding. 



(Hay, I'roc. U. S Nat. Mus. 1880,495.) 



256 UL.OCENTRA Jordan. 



.Ionian, Man. V.-rl. K. I". S. <<!. 2, 223, 1878; type Jr/j/m iitrijnimi* Jor.) 



r.odv moderately elongate, little compressed. Head short, thick, with 

 tumid cheeks. Month small, horizontal, the lower jaw included. Pre- 

 maxillaries protractile, little movable; maxillary movable, not joined to 

 thepreorliit.il except at its root; vomerine teeth present, small. Gill- 

 memliranes more or less broadly connected. Scales moderate. No ven- 

 tral plates. Lateral line complete or incomplete. First dorsal with 12 



