66 



FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. V. 



mouth rather large, little oblique, tip of maxillary reaching vertical 

 from front 9f eye; snout $}4; interorbital width 2$ in head; eye 

 large, its diameter 3 in head; origin of dorsal fin midway between 

 tip of snout and base of caudal fin ; about 1 5 scales in a series between 

 nape and dorsal fin; longest dorsal ray i^ in head; base of dorsal 

 2 in head; pectorals i in head; ventrals ijA\ base of anal 2 l / z in 

 head; lateral line decurved, complete; caudal fin forked; caudal 

 peduncle stout, its least depth nearly half head. 



Color straw, lighter below; a faint lateral band on posterior half 

 of body, ending usually in a black caudal spot. Length about 3 

 inches. 



56. Nototropis robustus Meek. 



Notropis robustus Meek, Field Col. Mus. Pub. '65, 1902, 82; Santa 



Rosalia; Jimenez. 

 Upper tributaries of the Rio Conchos in Chihuahua. 



FIG. 17. NOTOTROPIS ROBUSTUS Meek. 



No. 3548, Field Columbian Museum. 



Head 3X1 depth 4; D. 9; A. 8; scales 6-37-4. Body robust, back 

 little arched, its highest point being just in front of dorsal fin; snout 

 blunt, its length 3^3 in head; mouth large, nearly terminal, slightly 

 oblique; maxillary 3^ in head, its tip reaching vertical from pupil; 

 teeth 4-4, the tips slightly hooked; eye large, its diameter 3^ in 

 head; interorbital space 3 in head; origin of dorsal midway between 

 base of caudal and nostril; 15 scales in a series between nape and 

 origin of dorsal fin; pectoral fins long, nearly reaching ventrals, 1^2 

 in head; ventrals 2 in head. 



Color olivaceous, a dark lateral band from snout to base of caudal 

 fin, ending in a small caudal spot; chin white. Spawning time the 

 latter part of June. 



