MAY, 1902. THE ICHTHYOLOGY OF MEXICO MEEK. 85 



Notropis santarbsaliae, sp. nov. 



Type, No. 3535, F. C. M. Length, 1.92 inches. 



Locality: Rio Nonava, Santa Rosalia, Chihuahua, Mexico. 



Head 4; depth 4^: D. 8; A. 10; scales 6-37-3. Body elongate, 

 rather slender: snout pointed: mouth, large terminal, oblique: 

 jaws about equal, end of maxillary reaching to middle of the 

 pupil, margin of upper lip on level with center of eye: eye large. 

 3 in head; snout 4. 



Origin of dorsal fin midway between base of caudal and ante- 

 rior margin of orbit, 18 scales in a series before dorsal fin: base 

 of dorsal fin 2.V in head, its longest ray if in head; pectorals i| 

 in head: ventrals ii; lateral line decurved, complete. The lat- 

 eral line runs about one scale below the lateral band. Color 

 light olivaceous, with a broad dark lateral band from snout 

 through eye to base of caudal. The band is more prominent on 

 the posterior half of the body. It does not end in a black caudal 

 spot: fins all plain. 



This species belongs to the rubrifrons type. It differs from 

 N. rubrifrons in the shorter snout, more forward position of dor- 

 sal fin, and in the prominent dark lateral band. Taken only at 

 Sant'a Rosalia. 



Xystrosus popoche Jordan Snyder. 



Common at both Ocotlan and La Palma. 



Falcula chapalae Jordan & Snyder. 



Common in Lago de Chapala. La Barca: Ocotlan: La Palma. 



Evarra tlahuacensis, sp. nov. 



Type, No. 3681. F. C. M. Length. 2.35 inches. 



Locality: Chalco Lake, Tlahuac, Mexico, Mexico. 



Head 4: D. 5^: D. 8: A. 14: scales 95: eye equals snout, 35 in 

 head: upper jaw protractile; teeth 4-4. tips hooked, grinding sur- 

 face fairly well developed. 



Body elongate, rather slender; snout blunt: mouth little 

 oblique: tip of maxillary reaching anterior margin of orbit: diam- 

 eter of the eye equals the length of the snout, 35 in the length of 

 the head: upper jaw protractile: gill membranes connected to 

 isthmus; peritoneum black: the length of the alimentary canal 

 equals distance from eye to tip of caudal fin. 



Origin of dorsal midway between base of caudal and poste- 

 rior margin of eye: about 38 scales in a series before dorsal fin: 



