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 multiradiatus 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 (Gunther), 



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 emphysetus Miiller & 

 Troschel. 



Range : Tropical seas, a few of the 



species entering rivers. 



Al. 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 (Gunther), 



Meek, u. 



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. A meiurus australis Meek, ....Meek, 13. 



Habitat : Rio Panuco to Rio Blanco. 



2. Ameiurus dugesi Bean Meek, 15. 



Amiurus catus Pellegrin. 

 Habitat : Lerma Basin. 



3. Ameiurus mexicanus Meek, .Meek, 15. 



Habitat: Rio Panuco Basin. 



4. A meiurus 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, 

 i. Istlarius balsanus Jordan & Snyder, 



Meek, 17. 

 Habitat : Balsas Basin, Mexico. 



Subfamily CALLOPHYSIN^:. 



CALLOPHYSUS Miiller & Troschel. & Troschel ; Pimelotropis Gill ; Pseu- 



Type : Callophysus ntacropterus Miiller 



1 Ictalurus furcatus and punctatus of the Mississippi 

 valley reach the Rio Panuco. 



docallophysus Bleeker. 

 Range that of the single species. 

 A i. Callophysus macropterus (Lichten- 



