62 Field Columbian Museum — Zoology, Vol. V. 



m 





Fig. 15. Aztecula mexicana Meek. 



No. 360b, Field Columbian Museum, 



caudal peduncle slender, its least depth 2^ in head; lateral line 

 decurved and wavy, complete or missing on a few scales. 



Color dark brownish above, lighter below; a faint lateral band, 

 most conspicuous on last half of the body; the faint caudal spot 

 more prominent in the young. 



This species differs from the preceding in having smaller scales. 

 Length about 3 inches. 



21. Nototropis Rafinesque. 

 The Shiners. 



Notropis Rafinesque, Amer. Monthly Mag., 11, 1818, 204. (Type, 



Notropis atherinoides Rafinesque.) 

 Codoma Girard, Proc. Acad. Nat. Sci. Phila., 1856, 194. (Type, Co- 



doma ornata Girard.) 

 Albumops Girard, 1. c.,194. (Type, Alburnops blennius Girard.) 

 Montana Girard, 1. c, 199. (Type, Leuciscus lutrensis Baird & 



Girard.) 

 Graodus Giinther, Cat., vn, 485, 1868. (Type, Graodus uigrottznia- 



tus Giinther = Leuciscus boucardi Giinther.) 

 Orcella Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 1896, 289. 



(Type, Notropis orca Woolman.) 

 Body elongate, more or less compressed; mouth normal, mostly 

 terminal and oblique, or subinf erior ; no barbels; teeth 4-4, or o, 1 or 

 2, 4-4, 1 or 2, sharp-edged or with narrow grinding surface; scales 

 usually large, 30 to 55 in the lateral series; lateral line complete or 

 not, in some species not extending beyond base of ventrals; coloration 

 more or less silvery; males usually in the breeding season with much 

 red on body and fins, and with tubercles on head and body. The 

 fishes belonging to this group are all small, most of them less than 3 



