382 



PATAGONIAN EXPEDITIONS : ZOOLOGY. 



Habitat: La Plata and northward, en- 

 tering rivers. 



Arius Cuvier & Valenciennes. 



Type : Pimelodus arius Buchanan. 

 Range : Tropical seas, entering rivers. 



1. Arius agassizi (Eigenmann & Eigen- 



mann) , E. & E., 86. 



Habitat: Rio Grande do Sul. 



2. Arius multiradiatns Giinther, E. & E., 92. 



Habitat : Rios Bayano and Cianati, 

 Panama. 



Hexanematichthys Bleeker. 



Type : Bagrus sundaicus Cuvier & Val- 

 enciennes. 



Range : Tropical seas, a few of the spe- 

 cies entering rivers. 



1. Hexanematichthys assimilis (Giinther), 



E. &. E., 81. 

 Habitat : Atlantic coast of Central 

 America ; Lake Yzabel, Guatemala ; 

 Rio Magdalena. 



2. Hexanematichthys grandoculis (Stein- 



dachner) , E. & E., 85. 



Habitat : Rio Doce. 



Sciadeichthys Bleeker. 



Type : Bagrus cmphysetus Miiller & 

 Troschel. 



Range : Tropical seas, a few of the 

 species entering rivers. 

 Ai. Sciadeichthys albicans (Cuvier & Val- 

 enciennes) , E. & E., 59. 



Habitat : Amazon and northward. 



Subfamily Ictalurin^e. 



ICTALURUS Rafinesque. 1 



Range: Isthmus of Tehuantepec north- 

 east throughout the Atlantic slope. 

 I. Ictalurus meridionalis (Giinther), 



Meek, 11. 

 Habitat: Atlantic slope of the Isthmus 

 of Tehuantepec. 



Ameiurus Rafinesque. 



Type : Pimelodus cupreus Rafinesque. 



Range: Lerma Basin and valley of 

 Mexico northeast throughout the At- 

 lantic slope of America. 



(Haustor Jordan & Evermann.) 

 (Type: Gadus lacustris Walbaum.) 



1. Ameiurus australis Meek Meek, 13. 



Habitat: Rio Panuco to Rio Blanco. 



2. Ameiurus dugesi Bean Meek, 15. 



Aviiurus catus Pellegrin. 

 Habitat : Lerma Basin. 



3. Ameiurus mexicanus Meek, .Meek, 15. 



Habitat : Rio Panuco Basin. 



4. Ameiurus pricei (Rutter), . . . .Meek, 16. 



Habitat : Mesquital Basin north in 

 streams of the Sierra Madre. 



ISTLARIUS Jordan & Snyder. 



Type : Istlarius balsanus Jordan & 



Snyder. 

 Range that of its single species. 

 1. Istlarius balsanus Jordan & Snyder, 



Meek, 17. 

 Habitat : Balsas Basin, Mexico. 



Subfamily Callophysin^:. 



Callophysus Miiller & Troschel. 

 Type : Callophysus macropterus Miiller 



1 Ictalurus furcatus and punctatus of the Mississippi 

 valley reach the Rio Panuco. 



& Troschel ; Pimelotropis Gill ; Pseu- 

 docallophysus Bleeker. 

 Range that of the single species. 

 Ai. Callophysus macropterus (Lichten- 



