124 TELEOSTEI: ACANTHOPTERI. XX. 



j. Scales about 5-50-9; D. IX -12; lateral line often incomplete behind; 

 fins moderate. 



326. E. nigrum Rafinesque. " JOHNNY." Body slender, fusi- 

 form ; snout somewhat decurved ; mouth small, sub-inferior ; pale 

 olive, back speckled with brown ; sides with numerous W-shaped 

 blotches ; males in spring dusky anteriorly, sometimes entirely black. 

 Head 4J; depth 5. D. IX- 12. A. I, 8. Vert. 15 -f 22 = 37. 

 L. 2^. Dakota to W. Penn. and Mo., very abundant in small 

 brooks. (Boleosoma maculatum Agassiz.) 



yy. Scales about 5-40-6; dorsal rays IX -13; lateral line complete; 

 fins very high. 



327. E. effulgens (Girard). Snout much decurved ; brown, with 

 9 spots on side ; fins black ; 2d D. and C. with white specks. Head 

 4 ; depth 5^. L. 2. Penn. to N. C., probably a variety of B. 

 nigrum. (? B. cesopus Cope; D. VII -14.) (Lat., shining.) 



hh. Soft dorsal with 10 or 11 rays. 

 i. Cheeks naked ; opercles scaly; scales 4-35-6. 



328. E. vexillare Jordan. Body rather stout; nape naked; 

 snout decurved; fins very high; dusky olive, faintly barred; 

 2d D. and C. with pale spots ; other fins mostly black. Head 4 ; 

 depth 5. D. VIII -10. A. I, 7. L. 2. Rappahannock R., Va., 

 one specimen known. (L., bearing a standard.) 



u. Cheeks and opercles wholly naked; scales in lateral line 45. 



329. E. susanae (Jordan & Swain). Very slender; head short 

 and small, the snout decurved ; head, nape, breast, and middle of 

 belly naked ; fins low. Color of E. nigrum. Head 4^ ; depth 6^. 

 D. VIII -10. A. I, 8. L. 2. Cumberland R., abundant in S. Ky. 

 (To Mrs. Susan Bowen Jordan.) 



gg. Lateral line ceasing near middle of body. (Vaillantia J Jordan.) 



330. E. chlorosoma (Hay). Body slender, with long tail ; back 

 somewhat elevated ; mouth small, inferior, the snout strongly de- 

 curved ; cheeks, opercles and breast scaly, nape naked ; fins small. 

 Olivaceous, the back spotted ; about ten dark spots on sides ; a dark 

 opercular spot ; head spotted above ; D. and C. barred. Head 4^ ; 

 depth 5J. D. X-10. A. 1, 8. Scales 5-56-10. Vert. 38. L. 2. 

 111. to Ala. and Ark., common S. W. (Boleosoma camurum Forbes). 

 (xXeapoff, green ; crayta, body.) 



ff. Anal spines two, well developed, the first usually the longer. 



m. Gill membranes more or less broadly united; belly with ordinary 



scales. 

 w. Maxillary normal, free from the preorbital. (Ulocentra 2 Jordan.) 



1 To Leon Vaillant, author of a monograph of the Darters. 

 8 ovAos, complete ; Ktvrpov, spine. 



