Eigenmann: Collection of Fishes from Paraguay. 1.35 



N. Depth 4.7. 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 longior (Cope) 40. 



NN. Depth 2.5-3.5 in the length. 



O. 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| ; depth 2>~?>H > sca les 5-32-3. A. 21-22. 



copei (Steindachner) 41. 



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



Maxillary extending nearly to the front margin of the eye ; 



anterior dorsal and anal rays elongate. Head 4* ; depth 



3| ; scales 4-35-3 ; A. 19 diaphanus (Cope) 42. 



000. The narrow silvery band edged with greenish above; 

 humeral spots distinct. Origin of the dorsal just behind 

 the ventral ; the pectoral reaches to the middle of the 

 base of the ventral. Head Z\~Z}i '■> depth 2#-2^ ; A. 

 24-25 ; scales 5-32 or ^-^...colletti (Steindachner) 43. 

 MM. Caudal and humeral spots present. Anal 24; scales 5-28-3. Head 

 4 ; depth 2^. Origin of the dorsal fin behind the ventral. Max- 

 illary extending to the front margin of the eye. 



oligolepis (Gunther) 44. 

 LL. Maxillary with teeth. 



P. Middle caudal rays black. 



Q. One to three teeth in the maxillary. 



R. A. 18-25. Lateral line with 37-40 scales; a silvery-gray 

 lateral band ; a dark caudal spot fading out forward. 

 Usually a humeral spot. Maxillary with two small teeth. 

 Head 4 ; depth 2^-3 ; scales 7 or 8-37 to 40-3 ; eye 3 in 



head '. mexicanns Fi lippi 45 . 



RR. A. 24-27. Origin of the dorsal behind the base of the ven- 

 trals ; maxillary toothless, reaching anterior border of the 

 orbit. Head 4 ; depth 2^-23^ ; A. 24-27 ; scales 



7-9-35 to 39-6 or 7 (vneus (Gunther) 26. 



RRR. A. 18-25, rarely as many as 27. A dark caudal spot ex- 

 tending to the end of some of the rays and fading out 

 anteriorly ; a silvery lateral band ; an indistinct humeral 

 spot ; ventral and pectoral fins with red. Head 4, longer 

 than its depth at the occiput ; depth 2^-3 ; scales 5 or 



6-33 to 40-4^ to 7 .fasciatus (Cuvier) 46. 



RRRR. A. 19-21 ; three or four scales below the lateral line ; 

 head 4-4-K '■> de P th 2l A~3 5 scales 5"35 to 37-3 or 4 ; 



eye 3 in head .fasciatus iheringi (Boulenger) 47. 



QQ. Numerous minute teeth on the maxillary, which extends either a 

 little or distinctly behind the front margin of the orbit. Eye 

 small, 3.5-4 in the head. A vertically elongate humeral spot 



