March, 1914. List of Fishes of Costa Rica — Meek. 117 



than those found in the larger streams in or near the lowlands. With- 

 out the opportunity of examining material from the salt or brackish 

 water of Costa Rica, and after comparing the material at my command 

 with specimens from the salt water at Vera Cruz, Mexico, it seems 

 best to recognize these inland forms as a variety or subspecies of the 

 preceding. 



The females and many of the males of these inland forms usually 

 have a black spot at the base of the middle dorsal rays, the free margin 

 of the dorsal is straight or slightly convex, and the caudal fin is sub- 

 truncate, and in these respects this subspecies presents a few trifling 

 differences from the species. On many specimens from salt and brack- 

 ish water some of the scales have a dark spot which forms lines along 

 the rows of scales. These spots are not present on the specimens from 

 the uplands and are scarcely present on some from the larger lowland 

 streams. In both the species and subspecies some of the larger males 

 have a very high dorsal fin. On many of the males, especially from 

 the larger streams, the basal half of the caudal is black, or with black 

 blotches; on some of these the basal half of the dorsal is also black. In 

 general, the upland specimens are more uniform in coloration than 

 those from the lowland streams. 



Patarra (17), 52 to 80 mm. (Alfaro); Rio Maria Aguilar, San Jose 

 (8), 48 to 80 mm.; Rio Tiribi, San Jose (275), 30 to 70 mm.; Rio Grande, 

 Orotina, April 22 (29), 28 to 80 mm.; Rio Machuca, Orotina (20), 30 to 

 60 mm.; Turrubales (75), 30 to 90 mm.; Jesus Maria (2), 43 mm.; 

 Virginia (5), 45 to 72 mm.; Zent, April 12 (20), 37 to 92 mm.; La Victoria 

 (24), 28 to 105 mm.; La Junta (24), 60 to no mm.; Parismina (11), 

 43 to 90 mm.; Guapilis (35), 44 to 95 mm.; Turrubales (3), 64 to 78 mm. 

 (Alfaro); Rio Maria Aguilar, San Jose (20), 30 to 60 mm. (Alfaro); 

 Chitaria (i), 53 mm. (Alfaro); Turrialba (i), 50 mm. (Alfaro); Tucur- 

 rique (4), 65 to 120 mm. (Alfaro); Tiribi (2), 64 to 70 mm. (Alfaro); 

 Las Lajas, Taboga (12), 35 to 45 mm. (Alfaro); Rio Higuer6n (30), 

 37 to 83 mm. (Alfaro). 



Family MugilidSB. 



Joturus pichardi Poey. Bobo. 



Joturus pichardi Poey, Mem., 11, 263, 1861 (Cuba); — Jordan & 

 Evermann, Bull. 47, U. S. Nat. Mus., 1896, 821 (Costa Rica); — 

 Meek, Pub. Field Mus., Zool. Ser., vii, 1907, 148 (Reventazon 

 River; El Sardinal, Santa Clara, Costa Rica). 



