2iG coNTKinrrniN.s TO NOKTII AMERICAN ICHTHYOLOGY iv. 



and must distinct posteriorly: a dnsk\ band on head, through eyes aud 

 snout; tins plain. Head -I!,: depth iH. D. 8; A. 7; scales 0-47-5 ; 

 teeth -1-4, often with slight grinding- surface. L. 5 inches. Ohio Val- 

 ley and tributaries of tin (ircat Lakes. 



(L< mi lit Kirtluud, J3ost. Journ. N;ir. Hist, iii, 341, 1340: Ceratichlhya dis- 



Ovpr. iVnii. :>'.>?: L\r<iticliiltys distimilis Gunllier, vii, 177.) 



335. C. stcrictiis ope. 



Body slender, with long caudal peduncle, the least depth of which is 



little more than a third of the greatest depth of the body. Head long 



anil slender, the muzzle much projecting and broadly rounded. Mouth 



moderate, interior, the maxillary not reaching the front of orbit. Bar- 



bels conspicuous. Eye moderate. 4.V in head. Fins rather long, the 



caudal deeply forked. Color silvery; sides with a few dusky scales^ 



forehead pink in the males, as in C. rtibrif'rons. Head 4; depth 4j|. D. 



,-ales i;_;;o-:>: teeth 4-4. liio Grande, in New Mexico. (Cope.) 



Zool. Wl ; .l. W. Kinth Mi-r. v. tMii, 1S7(J.) 



336. C. aestivalis (Cinl.) Coj..-. 



Head rontained about 4$ times in the total length. Differs from 0. 

 ydidn.x and G. cci'ind!*, its American congeners, l.v a rather compressed 

 body, elevated and arched upon its middle region, and tapering rapidly 

 towards the peduncle of the tail. The snout is more protruding t! 

 in G. (jdiiliix, the eye larger, and the ventral iins inserted somewhat 

 moiv forwards. The scales an- also larger (about 30 in the lateral line 

 in the iigi're.,, deeper than long, anteriorly subtruncated and posteriorly 

 rounded, \\iih radiating furrows upon the latter section only. D. I, 8j 

 A. i. 7. etc. The color is yellowish brown, somewhat lighter beneath 

 th;u: above, with a silvery streak along the middle of the Hanks, liio 

 San Juan, Cadareita, New Leon, ((jirnrd.) (Of course these little fishes 



,<> intimate relation with the European genus (jobio, which i> 

 ally o! . s >v/o//7/<.\. with the te-tl. ,-. 5-5, 3, and the barbel lateral and 



\.T\ l<,!i I 



Proi . At u:. \;, liila. L856, IK'.) 



3:t^. '. xclidii* Qrd. Jor. 



Uody vei\ >icnder. not elevated. Head .^lender and elongate, the 

 snout piomiiieiit and taperi lCy< small, rather high, 4 in head. 



.Month small, siil-terminal, the maxillary not extending to the 

 I'i' Lateral line dee.urved. Scales rather large. Coloration 



sil'' dn>i\ .uid a blj-ckish spot ;it base of c.audaL 



