414 Annals of the Carnegie Museum. 



This specimen agrees in every detail with the one from the Rio 

 Itapicurii. 



y22,oa-b, C. INI., two, 90-105 mm., no label. Haseman. 



7231a, C. M., one, 205 mm., Joao d'El-Rei, Rio das Mortes, flowing 



into Rio Grande, which empties into the Parana, May 17, 1908. 



Haseman. 

 7228a, C. M., one, 205 mm., Rio Mogy Guassu, tributary of the Rio 



Grande, a tributary of the Parand, Aug. 25. 1908. Haseman. 



From Rio Grande do Sul. 

 72290-^, C. M., eleven, 161-259. mm., Porto Alegre, Jan. 17, 20, 22. 

 1908. Haseman. 



The specimens from Porto Alegre in general resemble specimens from 

 British Guiana. The maxillary barbels are variable; in some speci- 

 mens they reach the end of the ventrals and in others they reach the 

 end of the adipose. In color they show distinctly the silvery appear- 

 ance which is overlaid with brown above. They have six rows of 

 spots along the sides, the fourth row from the dorsal having about 

 twenty spots. The spots are smaller than in specimens from the Rio 

 San Francisco, being about the size of the lens of the eye. These 

 specimens agree in every particular with a paratype of Pimelodus 

 ortmanni Haseman (Ind. Univ. Mus. No. 13328) from the Rio Iguassii. 

 Hence we conclude that Pimelodus ortmanni Haseman is a synonym 

 of Pimelodus clarias (Bloch). 



From the Amazon basin. 



7217a-/, C. M., twelve, 63-160 mm., Santarem, Dec. 6, 1909. Hase- 

 man. 



The specimens from Santarem have long maxillary barbels, in some 

 cases reaching the end of the caudal. Most of the specimens are 

 evenly and moderately pigmented. A few, however, have the pig- 

 ment in three bands extending the entire length of the body. In 

 general they resemble the form from the Sao Francisco basin. 



72i8a-e, C. M., five, 77-172 mm., San Joaquin, Sept. 4-5, 1909. 

 Haseman. 

 These resemble the evenly colored specimens from Santarem. 



7219a, C. M., one, 181 mm.. Para, Dec. 24., 1909. Haseman. 

 J220a-c, C. M., three, 69-86 mm., Palo Grande Falls, Rio Mamore, 

 Sept. 30, 1909. Haseman. 



