348 Annals of the Carnegie Museum. 



No. 26650-ft, 2.3 and 3 cm., Cacequy, Rio Grande do Sul. 

 No. 2666, 7.5 cm., Joazeiro, Rio Sao Francisco, Nov. 28, 1907. 



This specimen has been bleached in denatured alcohol and has 

 many white spots in the fins and scales; no band beneath the eye; 

 the dorsal has twelve rays, which is often the number in this species. 

 No. 2667, 8 cm., Urucum Mts., near Corumba, May 2, 1909. 



This specimen is very dark; head 2.67; the dorsal fin is edged 

 with black, beneath which is a lighter streak, and the base is dark 

 brown. 

 No. 2668a-b, 4.5 to 5.5 cm., Bastos, Rio x'\legre, June 26, 1909. 



More slender and less compressed than typical C. lepidota. 

 No. 26']2,a-d, 4.5-8.3 cm., Sao Antonio de Guapore, July 30-August 3, 



1909. 



24 

 D. XVII, is; a. Ill, 10; pores . All of the specimens from the 



9 



Guapore river have about 45 scales in a median lateral series. Head 3; 

 depth 4.5; eye 4 and equal to the snout and interorbital space; oper- 

 cular band continuous along the side of body to base of caudal. 

 No. 26740-?), 5.5-9 cm., San Francisco, Bolivia (Paraguay basin), 



June 10, 1909. 



These specimens are identical with the Bastos specimens, both of 

 which were preserved in formalin. 

 No. 26750-^, 6 and 6.5 cm., Campos Alegre, Rio Jauru, June 3, 1909. 



These have faint lateral and transverse bands. 

 No. 2676a-//, 4-6 cm., Sao Luiz de Caceres, May 24, 1909. 

 No. 998, 6 cm., Puerto Suarez, Bolivia (Steinbach collection). 

 No. 26'jSa-d, 4-5 cm., Corumba, Rio Paraguay, April 27, 1909. 



One has a distinct lateral band and another has a black caudal. 

 No. 2679, 8 cm., Salto das Cruzes, Rio Tiete, Sept. 22, 1908. 



D. XVIII, 15; A. Ill, 9; pores -' ; depth 3.75; head 2.8; eye 5 



in the head; fins and body uniform dark brown with spots above the 

 base of pectorals, at base of caudal, and in base of soft dorsal. 

 No. 2680, 5-6 cm., Cidade da Barra, Bahia, Lagoa Pereira. 



Three of these specimens have the edges of the vertical fins very 

 dark; four of them have spots in the vertical fins, an ocellated 

 caudal, and pectoral spots. The following table will show the dif- 

 ference between the two forms of C. lepidota found in the Rio Sao 

 Francisco: 



