HaSEMAN : EXPEDI'IION TO CeNTKAI, SOU'IH A.MKRKA. 349 



The four spccinu-ns with dorsal Throe specimens without spots 



and caudal spots. and with dark margins on fins. 



D. XVI, 14 or 15; I). XVI, 13; 



A. Ill, 8; A. Ill, H; 



Depth 4.:>3; Depth 4.17; 



Head 3; Head 3; 



T^ 21 ^22 



Pores — ; Pores -- ; 



9 9 



Scales 34-37. Scales 39 or 40. 



These two end variations show niarkerl differences, but complete 

 series of intergradations arc found in the same localities. None of 

 the Sao Francisco specimens have bars beneath the eyes, and all are 

 smaller in size and more slender than typical specimens. 

 Xo. 2682, 7 cm., Santa Rita, Rio Preto, Bahia, Jan. 24, 1908. 

 Xo. 2683, 7 cm., Rio Itapicuru. 



21 

 D. XVI, 12; A. Ill, 8; pores ; scales 36; depth 4.33; head 3; eye 



4-^5- 



Xo. 26S^a-e, 4.3-5.2 cm.; Cidade da Barra, Lagoa do Porto, Dec. 24, 



1907. 

 Xo. 2685, 5 cm., Rio Zinga, State of Bahia, No\'. 7, 1907. 



This specimen is more like a typical C. lepidota than the Sao Fran- 

 cisco form, but it has no bars beneath the eyes. 



Xo. 2686a-c, 3.5-7.5 cm., Rio Paqui, State of Bahia, Xov. 14, 1907. 

 Xo. 2687a-/, 8.5 cm., Queimadas, Rio Itapicuru, March 2, 1908. 

 Xo. 2688, 9.2 cm.. Propria, Rio Sao Francisco below the falls, March 



30, 1908. 



D. X\'I, 12; A. Ill, 9; scales 38; depth 4; head 2.8; eye 4.5 in the 

 head, 1.5 in the snout and 1.25 in the interorbital space; vertical 

 fins white-spotted; ocellated caudal and pectoral spots; fins not dark- 

 edged; a dark lateral band, above which are five vertical bars; four 

 series of teeth in each jaw. 

 No. 26Sga-b, 5.5 and 6.5 cm., Santa Rita, Rio Preto, Bahia, Jan. 24, 



1908. 



The smaller specimen has 34 scales in the first series below the 

 lateral line, the caudal peduncle is as long as deep, the vertical fins 

 are unspotted, and the lateral band has five vertical bars above it. 

 The larger specimen has white spots on some of the scales and on the 

 vertical fins. 

 No. 2690, 4 cm., Uruguayana, Rio Grande do Sul, Feb. 6, 1909. 



