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INDIANA UNIVERSITY STUDIES 



2. Bryconamericus diquensis sp nov. 

 Type, 60 iiiiii. ^ Soplaviento. CM. No. 5072. 



Paiatypes, 10, 40-50 mm. SoplaA ieiito. CM. No. 5073 a-e ; I. U. M. No. 

 12820 a-e. 



Head 4.8-5 ; depth 3.9-4.2 ; D. 10 ; A. usually 35 or 36 ; rarely 33, 34, 37 

 or 38. Scales 6-41 to 43-5 (5 above the lateral line in one, 4 below it in 

 two) ; eye 2.6-2.75, greater than interorbital. Base of anal 2.66-2.75 in the 

 length. 



Maxillary not reaching the suture between the second and third sub- 

 orbitals. No interpolated rows of scales below the lateral line ; origin 

 of anal on or very little behind the vertical from the origin of the dorsal. 



Lateral band sharply defined both above and below. Prominent chro- 

 matophores along the bases of the anal rays. A few chromatophores about 

 half way between lateral line and anterior part of anal. 



Brycanamericus chocaei^sis p nov 

 Type, 61 mm. Istmiua. CM. No. 5036 a. 



Paratypes. 200, largest 68 mm. Istmina. CM. No. 5037 a-z ; I.U.M. 

 No. 12939. 



Paratypes. 3, largest 60 mm. Half way between Istmina and Puerto 

 Negria. CM. No. 5038. 



Paratypes, 19, largest 63 mm. Puerto Negria. CM. No. 5039 a-j ; 

 I.U.M. No. 12940. 



Paratyiies. 3. lagest 51 mm. Boca de liaspadura. CM. No. 5040. 



Paratypes. 11, largest 50 mm. Boca de Certegai. CM. No. 5041 a-f ; 

 I.U.M. No. 12941. 



Paratypes, 75, largest (]8 nun. Quibdo. CM. No. 5042 a-j ; I.U.M. 

 No. 12942 a-j. 



Head 4.3-4.5 in San Juan specimens, 4.33-4.75 in Atrato specimens; 

 depth 3.4-3.75 in San Juan specimens, 3.75-4 in Atrato specimens ; D. 10 

 (rarely 9) ; A. usually 31 or 32, sometimes 29, 30, 33 or 34; scales 5-39 to 

 41 (rarely 37) -4; eye 2.5-2.75 in San Juan specimens, 2.75-3 in Atrato speci- 

 mens, equal to the interorbital. 



Siiecimcns from the San Juan, deeper, more compressed than those 

 from the Atrato. Maxillary not reaching the suture between the first 

 and second suborbitals ; no inter])Olated rows of scales below the lateral 

 line ; base of anal three or a little more than three in the length, its 

 origin equidistant with the middle or end of the dorsal from the snout. 



Lateral band sharply defined above and below. Caudal margined with 

 dusky. Chromatophores at base of anal tending to arrange themselves 

 along the interhc^mals ; more prominent in the Atrato specimens than in 

 those from the San Juan, most prominent in those from Boca de Certegai. 



4. Bryconamericus magdalenensis sp, nov. 



Type, 71, mm. Girardot. CM. No. 5063. 

 Paratypes : 



Several hundred, largest 72 mm. Girardot. CM. No. 5064 ; 

 I.T^M. No. 12822. 



Head 5-5.33; depth 3.-3.5; A. 40-43; scales 5-41 to 43-4. 



