Eigenmann: Collection of Fishes from Paraguay. 143 



sqnai?wsus ranging from 70 to 280 mm. These leave no doubt that 

 the specimen (No. 9969) under consideration represents a distinct and 

 most strikingly marked species of the genus. 



81. Charax squamosus (Eigenmann & Kennedy) (Plate XLIII, 



Fig. 2). 

 Of this species we have a specimen from Bahia Negra (404) 230 

 mm. to base of caudal. The profile becomes more and more concave 

 with age, as the result of the humping of the nape, so that in the 

 largest specimen the depression is 6 mm. below the line joining the 

 tip of the snout and the nape. Formalin specimens all show a dis- 

 tinct humeral spot, a larger caudal spot and a well-defined black band 

 uniting the two. In alcoholic specimens th* 3 Sumeral spot is not 

 apparent and the black lateral band is hidden b ie silvery band over- 

 lying it. 



82. Cynopotamus knerii Steindachner. 



Specimens from Bahia Negra (373) and Corumba (341). 

 8^. Rceboides bonariensis Steindachner, Soiru pintada. 



Corumba (356). It is very probable that this specimen, as well as 

 those mentioned as microlepsis by Eigenmann & Kennedy, are R. 

 bonariensis. 



84. Rceboides prognathus Boulenger. 

 Rio Otuquis (371). 



85. Acestrorhynchus ferox Giinther. Pez de Cachorro. 

 Corumba (332) . 



Gymnotid^e. 



86. Eigenmannia vires c ens ( Val. ) Cubiha. 

 Corumba (293, 346). 



87. Stemopygus macrurus Bloch & Schneider. 

 Corumba (294). 



88. Gymnoius carapus Linnaeus. 

 Corumba (295). 



PCECILITDyE. 



89. Girardinus caudomaculatus Hensel. 



Numerous specimens ; exceedingly abundant in a mountain brook, 

 Arroyo Itoroto at Sapucay (458). 



BELONTD/E. 



90. Potamoraphis guianensis (Schomburgk). Pez d'Aquelha. 

 Tuyuyu (298). 



