eigenmann: fresh water fishes. 263 



dorsal over ventrals. A. 30 ; scales 8-37 or 38-7. 



12. wz^onz (Boulenger). 

 00. Maxillary extending little if any beyond origin of eye. 

 /. Dorsal plain. 



q. Humeral .spot horizontally elongate. 



r. Scales in 19 or 20 rows, 10-43 ^'^ 47-8 or 9 ; 

 anal 28-32. Caudal plain or with an indis- 

 tinct spot ; humeral spot indistinct or wanting. 

 Dorsal distinctly behind the ventral; the 

 pectoral reaches the ventral. Depth 2| ; 

 head less than 4. 



13. abramis (Jenyns). 

 rr. Scales in fewer than 17 rows. 

 s. Moderately compressed. 



/. Teeth of the inner series of the pre- 

 maxillary with their posterior 

 surface convex, the denticles cor- 

 responding to the convexity 

 arranged in a U-shaped line. 

 Scales 6 to 8-30 to 40-5 to 8 ; 

 maxillary with 0-4 teeth, extend- 

 ing somewhat beyond the front 

 margin of the eye. Depth 2-2.1; 

 head 4-4.2 ; eye 3 in the head. 

 A. 27-39. 



14. bimaculatus^ {yxan-atws). 

 tt. Teeth of the inner series of the pre- 

 maxillary alike in front and be- 

 hind, the denticles arranged in a 

 nearly straight line ; scales 6- 

 40—6 ; maxillary with a single 

 tooth, extending to below origin 

 of pupil ; depth 2.4 ; head 4 ; eye 

 a little more than 3 in head. 



A.33- 



15. orthodjis {^\g&x\m2t.x\r\). 



ss. Greatly compressed. Scales 7 or 8-36 



to 37-6 or 7 ; a humeral and caudal 



spot ; the pectorals extend beyond 



' The statement of Steindachner that the maxillary has minute teeth along its entire edge is 

 evidently due to a slip of the pen ; A. brevoortii from Trinidad has the following characters : 



Scales 7-37 to 40-7 ; very distinct humeral and caudal spots, the latter often extending to 

 the ends of the caudal rays ; an obscure silvery band. Eye i\ ; maxillary sometimes with a 

 single tooth. A. 29-34 ; var. lincaUis from the La Plata system has more or less distinct series 

 of spots or lines following the rows. 



