I04 Field Museum of Natural History — Zoology, Vol. X. 



to 140 mm. (Alfaro); San Jose (2), 91 and io8 mm. (Alfaro); Rio Maria 

 Aguilar (8), 93 to 135 mm. (Alfaro); Rio Tiribi, San Jose (79), 45 to 

 1 60 mm. (Alfaro); Tiribi (19), 70 to 150 mm. (Alfaro); Patarra (2), 

 80 to 130 mm.; San Jose, April 26 (79), 50 to 150 mm. 



Rhamdia heteracantha Regan. 



Rhamdia heteracantha Regan, Biol. Cent. Amer., 1907, 134 (Juan 



Yinas, Costa Rica). 

 Parismina (5), 125 to 205 mm. 



Rhamdia underwood! Regan. 



Rhantdia underwoodi Regan, Biol. Cent. Amer., 1907, 135, pi. 23, 



fig- 4 (Juan Vinas, Costa Rica). 

 Costa Rica River (i), 155 mm.; Chitaria (i), 83 mm. (Alfaro); 

 Tobosi (9), 68 to 105 mm. (Alfaro). 



Rhamdia nasuta Meek. 



Rhamdia nasuta Meek, Pub. Field Mus., Zool. Ser., vii, 1909, 207 



(Buenos Aires de Terraba, Costa Rica) . 

 Buenos Aires de Terraba (i), 125 mm.; Las Lajas, Taboga (17), 

 50 to 125 mm. (Alfaro). 



Rhamdia wagneri (Gunther). 



Pintelodus wagneri Gunther, Fishes Cent. Amer., 1869, 474 (Pacific 



and Atlantic Rivers of Panama). 

 Rhatndia wagneri Regan, Ann. & Mag. Nat. Hist., 1908, 457 (Rio 



Ballena). 

 This species was not obtained by me. 



Arius evermanni Gilbert and Starks. 



Aritis evermanni Gilbert and Starks, Mem. Cal. Ac. Sci., 1904, ^2, 

 pi. 5, fig. 10 (Panama Bay); — Regan, Ann. & Mag. Nat. Hist., 

 1908, 457 (Rio Ballena). 

 This species more properly belongs to the salt-water fatma. In- 

 dividuals of this and related species, however, often ascend streams to 

 some distance, but probably not beyond the limits of tide water. 



