62 TELEOSTEI: EVENTOGNATHI. — XII. 



3^ in head, about equal to snout ; fins low ; dorsal well behind ven- 

 trals ; lateral line decurved. Greenish, pale above ; sides silvery ; 

 a dark vertebral line. Plead 4f; depth 5|-. A. 11. Scales 5-38-3. 

 L. 5. Great Lakes to Tenn., abundant in lakes and rapids in 

 rivers. Variable. (Alburnus ruhellus Agassiz.) (^Minnilun ditie- 

 mus Kaf., with shorter snout and smaller eye, is probably the same, 

 as also Alhurnellus jaculus Cope; the latter, from Michigan and 

 S., is slenderer, depth 6 in length.) (Like Aiherina.') 



130. N. arge (Cope). Eye very large, longer than snout, 3 in 

 head ; lateral line nearly straight , head large, the snout not very 

 blunt ; mouth large, the chin projecting. Pale, the silver band on 

 sides bounded above by a blackish Une ; a dark vertebral streak. 

 Plead 4J , depth 6. A. 11. Scales 5-39-3. L. 3i. Wabash Val- 

 ley (Evermaun) and S. Mich. ; slenderer than JV". atherinoides, 

 with much larger eye, but very hkely a variety, (apyfjs, shining 

 white.) 



U. Fins all small, the short V. not reaching vent, and barely to middle 

 of D. 



131. N. micropteryx (Cope). Very slender, compressed ; head 

 rather pointed; mouth large, oblique, the jaws subequal; eve mod- 

 erate, 3-^ in head; lateral line decurved; D. inserted well behind 

 V. Pale olive ; sides bright silvery, base of C. dusky. Head i\; 

 depth 5|. A. 10. Scales 6-39-2. L. 2f. Ozark region, E. to 

 E. TS. C, in mountain streams. {jxiKpos, small; irripv^, fin.) 



57. ERICYMBA Cope, {ipi, an intensive particle ; 

 Kvp.^r), cavity.) 



132. E. buccata (Cope). Body rather elongate, little com- 

 pressed, head long, with broad, prominent snout ; mouth small, 

 subinferior, the lower jaw shorter. Suborbitals broad, silvery, 

 crossed by conspicuous translucent or silvery mucous channels, as 

 are also the interopercle and lower jaw; 15 scales before D. ; lat- 

 eral line straightish ; eye large, 4 in head. Olivaceous, sides silvery ; 

 sexes alike. Head 4 ; depth 5. D. 8. A. 8. Scales 5-33-3. 

 L. 4. Mich, to Kans. and W. Fla., abundant in small, clear brooks, 

 remarkably distinguished by the structure of the bones of the head. 

 (Lat., big-jawed.) 



58. PHENACOBIUS Cope, {(piva^, deceptive ; /3i'or, life.) 

 a. Scales rather large, 40 to 52. 

 6. Breast scaly. 



133. P. teretulus (Cope). Body slender, subterete ; snout 

 thick, decurved ; mouth small ; eye large, high up, 3i in head. 

 Yellowish, darker above, a plumbeous lateral band. Head 4|. 

 depth 4|. D. 8. A. 7. Scales 6-43-5. L. 3^. W. Va. (Lat., 

 terete.) 



