ElGENMANN : COLLECTION OF FlSHES FROM PARAGUAY. 129 



depth 2^-2^ ; A. 41-45 ; maxillary with a single, 

 rather large caducous tooth ; eye 2.4 in the head, about 

 equal to interorbital ; head 4. 1 -4. 5. 



pelegrini Eigenmann 5. 



ggg. Scales 8-42-7 or 8 ; A. 42 ; eye 3.7 in the head, 1.7 in 



the interorbital; head 3.7 in the length; a caudal 



spot corren/tm/s (Holmberg) 6. 



dd. Scales 37-38. 



//. Several small teeth on the maxillary; head 3| ; c'epth 3 or 

 somewhat more than 3 ; snout 4 in the head ; a silvery lat- 

 eral band bordered above by blue-green ; a round humeral 

 spot ; caudal spot, when present, extends to the end of some 

 of the caudal rays. A. 43 ; scales 6-37 or 38-4. 



bairdii (Steindachner) 7. 

 hh. Maxillary with a single small tooth. Scales in lateral line 

 37 or 38 ; caudal and humeral spots round, both very dis- 

 tinct ; middle of caudal fin thickly dotted with black ; 

 maxillary not reaching orbit ; head nearly 4 ; depth about 



23^; A. 40-42 tabatingce (Steindachner) 8. 



cc. Anal 30-41. 



j. A silvery lateral band ending in a black caudal spot, sometimes 

 two lateral spots in front ; maxillary very short, 2 in the eye ; 

 depth 2^-3; head 4-4^; eye 2^-2% in head ; D. 11, 

 posterior to ventrals ; A. 35-40. Lat. line 44-47. 



festce ( Boulenger) 9. 



jj. A black band extends from base of caudal fin along its middle 



rays ; maxillary extending to eye; eye 2|~3 in head ; depth 



22 A~ 2 H J h ead 4 5 A. 34-40; scales 8 or 9-40 to 50-8 or 9 ; 



last dorsal over first anal ray brevirosiris (Giinther) 10. 



it. Scales in the lateral line less than 40 (except in abramis, sometimes 

 in brevoorti and bimaculatus). 



k. Anal rays 36 or fewer, rarely as many as 39 in bimaculatus ; 

 maxillary with a few teeth or none. 



/. Depth more than three in the length, the form long and 

 slender; maxillary without teeth. 



m. No caudal or humeral spots; a silvery lateral band, 

 most distinct posteriorly ; head 3^ ; eye 2^ in the 

 head. A. 30; scales 5-35-3. .astichis (Ulrey) 11. 

 //. Depth less than 3 in the length; a distinct caudal spot. 

 n. No humeral spot ; depth 2^-2| ; eye 3^-4 in the 

 head ; maxillary with 0-3 teeth, extending consid- 

 erably beyond anterior margin of eye ; a conspicu- 

 ous black band on the caudal peduncle, becoming 

 wedge-shaped on the caudal. A. 29-31. Scales 



7 or 8-37 or 38-6 maxivnts (Steindachner) 12. 



;/;/. A distinct humeral spot. (See abramis.) 



0. Maxillary long, extending to below center of eye ; 



