514 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



Putnam. Bull. Mus. Comp. Zool. l< c f>:"!, 3: Elltcostjma linxleyi Srorer. Pror. 

 Soc. Nut. lli>:. I- 1 .")!, ;>7: Catimotiix t/<il Hutu* Vaillant ]. c. 121: <'ntnn1u liiixlryi 

 Vaillant. KVeheiehes. \^~'.\. 123: F.thcoxtomn jlnMlorc .Ionian. Man. Vert. eel. 2, 227.) 

 a Cheeks, opcreles. neck. and throat closely scaly ; jaws equal; lateral line nearly com- 

 plete. 



8Q5. E. sq^acaaaceps Jordan. 



Body rather elongate, considerably compressed, the caudal peduncle 

 deep. Head large ; tbe jaws comparatively short and equal. Lateral 

 line wauling only on a few of the posterior scales, and with occa- 

 sional tubes behind the continuous series. Spinons dorsal low and 

 short, the spines about equal, less than halt' the height of the second 

 dorsal ; bases of the two dorsals about equal, slightly connected by 

 membrane. Color dark, without spots, stripes or bands, in spirits; 

 male mottled, with about cross-blotches ; vertical fins cross-barred; 

 lower lins black in the male, pale in the female; a large black humeral 

 spot. Ilead 3 ; depth 5. D. IX-12 ; A. II, 7 ; scales 5-50--G. L. 1'^ 

 inches. Ohio Valley; not common. 

 (Jordan, Bull. U. S. Nat. Mus. x, 11, 1877.) 







266. P4ECIL.ICHTHYS Agassiz. 

 Rainbow Darter*. 



(Oligocephalus, Boleichtliyfi, Aplesion, and Jtrariim Girard: Astailchtliys Vaillant: 



Aga.ssiz. ) 



(Agassiz, Amer. Jonrn. Sci. Arts, 1854, 304: type I'actUchthi/s rariati<n Agassi/.=.E7/uw*- 



tontd <<>'> iih'H Storcr. ) 



Body variously robust or elongate, usually compressed. Head rather 

 large. Mouth moderate, nearly horizontal, terminal or nearly so; vo- 



mer with teeth; pvemaxillaries not])rotiactile. Gill-membranes scarcely 

 connected. Scales rather large, those oil the belly similar to the others. 

 Lateral line wauling posteriorly, its tubes beginning at the orbit. Dor- 

 sal spines Otoll, the middle ones highest and more than hall' the height 

 of the soft rays; second dorsal larger than spinous dorsal or anal; anal 

 with two spines, the first usually the larger. Vertebra- in /'. <-<!'ruli'>ix, 

 lo -f 18; in /' MM, 15 + 11. Si/.e small. Coloration usually brilliant. 

 (-<n/.'.).;, variegated ; r/Un-, fish.) 



The original types of <'<il<mt>liiK /,< miicolli, now in poor condition, show the follow- 

 ing characters: 



Color plain, without trace of lines or spots; pectorals, caudal, and both dorsal-, 

 checkered uiih black. Pdaek hllllieral spot large. Cheeks, opercles and breast naked. 



Scales rather large. Lateral line extending to below middle of second dorsal, (till- 

 membraues forming an angle with each other, pectorals a little shorter than head. 

 Hvjid :;:,'; depth :-.'. I). VIII. in; A. 11, 5 J BOaleB G-40 C. Prom Southern Illinois. 





