aaa. 



eigenmann: fresh water fishes. 267 



KK. Maxillary with numerous minute teeth, extending beyond the front 

 of the orbit. Snout shorter than eye. Eye 2.8-3. A. 29-30 ; 

 scales 5 or 6-32 or 33-4 to 5. Head 3.6; depth 2^-2*,' 

 humeral spot elongate horizontally. 



35. bahiensis (Steindachner). 



KKK. Maxillary without teeth. Silvery band not edged with green 



above ; origin of dorsal between ventral and anal ; pectorals 



to origin of ventrals, ventrals nearly to anal. Head 4I ; 



depth 3I; eye 2^\ in head; D. 10; A. 27; scales 5-37-3. 



36. albiirmis (Hensel). 

 XX. Scales 9-40 to 46-6-8; longitudinal series of scales 14-17. Caudal and 

 humeral spots generally absent ; origin of dorsal over root of ventrals. Width 

 of interorbital greater than the diameter of the eye. Head 4 ; A. 26-30. 

 Interorbital very convex, 2| in head; eye equals snout, 3I in head; depth 

 of caudal peduncle about \ of the depth. 37. cordova; (Giinther) 



XXX. Scales in 15 or 16 rows, 8-3910 45-7 ; A. 28 or 29 ; head 3.6 or 3.5 ; depth 

 2.7-3; eye large, 2.6-2.8; interorbital 3.25 in head; maxillary as long as 

 eye, with two narrow teeth ; dorsal behind origin of ventrals ; humeral spot 

 faint ; caudal spot distinct, not continued on middle rays. 



38. emperador (Eigenmann & Ogle). 

 Anal rays 16-25, rarely 26 and 27 in fasciatus and mneus ; 3 to 5 series of scales below the 

 lateral line in all but mieus (6 or 7) and fasciatus (4^-7). Caudal without black cross 

 band. 



Z. Maxillary without teeth; two or three scales below the lateral line. 

 M. No caudal spot. 



N. Depth 4.7 in the length; longitudinal series of scales 12. A broad 



silvery lateral stripe ; no caudal spot. Maxillary toothless, rather wide, 



extends little beyond anterior border of the orbit. Head 4.2 ; depth 



4-7 ; A. 25. ^g lo7igior (Cope). 



NN. Depth 2.5-3.5 in the length. 



0. A silvery lateral band sharply edged above with a dark band. Dorsal 

 fin a little behind the ventrals. The pectorals not entirely reaching 

 the ventrals, the ventrals reaching the anal. Head 3.8 ; depth 

 3-3f ; scales 5-32-3. A. 21-22. 40. co/>a (Steindachner). 



00. The broad silvery lateral band not edged above with dark. Maxil- 

 lary extending neariy to the front margin of the eye; anterior 

 dorsal and anal rays elongate. Head 4.4 ; depth 3^ ; scales 4-35- 

 3 ; A. 19. 41 diaphanus (Cope). 



000. The narrow silvery band edged with greenish above. Origin 

 of the dorsal just behind tlie ventral ; the pectoral reaches to the 

 middle of the base of the ventral. Head 3.4-3.75 ; depth 2.8-2.86 ; 

 A. 24-25 ; scales 5-32 or 33-3. 42. colUttii (Steindachner). 



LL. Maxillary with teeth. 



P. Middle caudal rays black. 



Q. One to three teeth in the maxillary. 



