70 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. V. 



61. Nototropis nazas sp. nov. 



Type, No. 4375, F. C. M., 2> inches in length; Santiago Papas- 

 quiaro, Durango. 



Headwaters of the Rio. Nazas in Durango. 



FIG. 19. NOTOTROPIS NAZAS Meek. 



Head 4%; depth 4^ to 4$; D. 8; A. 8; scales 10-49 to 54-5. 

 Body elongate, not much compressed; top of head flattish, the eye 

 being' much nearer the upper than the lower profile of the head; 

 snout rather pointed, slightly overhanging the mouth, 3 % in head; 

 mouth large, maxillary about reaching vertical from anterior margin 

 of pupil; maxillary 3 in head; teeth 4-4, hooked and with grind- 

 ing surface quite well developed; pharyngeal bones and teeth very 

 small; eye 3^3 in snout; origin of dorsal fin about midway between 

 base of caudal and anterior margin of eye; about 30 scales in a series 

 between nape and* dorsal fin ; base of dorsal i ^ in head ; its longest 

 ray i^ in head; pectoral i^ in head, its tips reaching about $ 

 distance from its base to base of ventrals; ventrals nearly reaching 

 anal, if in head; base of anal 2 in head; caudal fin deepjy forked; 

 caudal peduncle slender, its least depth 3^ in head; scales small, 

 smaller on upper anterior part of the body; lateral line complete. 



Color light brownish, lighter below; a narrow dark lateral band, 

 which ends in a faint caudal spot, on base of caudal rays; back finely 

 punctulate with dark dots, many being grouped to form larger dots. 

 Length about 2^ inches. Spawning time the latter part of May. 

 (Nazas, name of the river from which the type was taken.) 



Subgenus Moniana Girard. 

 62. Nototropis forlonensis sp. nov. 



Type, No. 4478, F. C. M., 2 inches in length; Forlon, Tamaulipas. 



Basin of the Rio Panuco. (Forlon; Valles.) 



Head 3^ to 4; depth 3*; D. 8; A. 9; scales 6-35-3. Body 

 elongate, considerably compressed; dorsal ?nd ventral outlines about 

 equal; snout pointed, 4 in head; mouth terminal, oblique; end of 



