DEC. 28,1916. FISHES or PANAMA MEEK AND HILDEBRAND. 345 



convex; anal with 6 or 7 strong spines, the soft portion similar to that 

 of dorsal; ventral fins more or less produced, reaching to or past origin 

 of anal; pectoral fins equal to or slightly shorter than head. 



Color brownish; sides in young with dark cross-bars as wide as 

 interspaces, in adult with a series of black blotches along median line 

 of sides; black dots on rows of scales forming dark lines, these most 

 distinct in large examples. Base of caudal with a short black bar or 

 spot; the vertical fins usually with dark spots; ventral fins dusky. 



This species is represented by 114 specimens, ranging from 29 to 300 

 mm. in length. It was taken only in the Rio Bayano and Rio Tuyra 

 basins. 



Our largest specimen sometime during its career had the lower lobe 

 of the caudal fin broken off at its base. The fin regenerated and again 

 formed normal rays, except that at the time of capture they had not 

 grown as long as the uninjured portion. 



This species probably resembles C. sieboldii (Kner & Steindachner). 

 The last named species was based on specimens from the west slope of 

 Panama. Our fish, however, differs so notably in several respects from 

 the species as described that we are unable to identify our specimens 

 with it. The body in the present species is slightly deeper; eye larger; 

 scales in lateral line more numerous; last dorsal spine is notably longer; 

 the pectoral fin is longer; the caudal fin is always notably rounded; and 

 there is a single series of black blotches placed along middle of side and 

 none on upper lateral line. 



Habitat: Rio Bayano and Rio Tuyra basins. 



76. Cichlasoma sieboldii (Kner & Steindachner). 



Heros sieboldii Kner & Steindachner, Abhandl. K. Bayer. Ak. Wiss. 



Munchen, X, 1864, 13, PI. II, fig. 2 (New Grenada, west slope, 



Panama). 

 Cichlasoma sieboldii Jordan & Evermann, Bull. U. S. Nat. Mus., XLVII, 



1898, 1516; Regan, Ann. & Mag. Nat. Hist., Ser. 7, XVI, 1905, 235. 



"Depth of body about 2% in length, length of head about $%. 

 Snout as long as postorbital part of head. Diameter of eye 4-5 in 

 length of head and 1^22^2 in interorbital width. Maxillary not 

 extending to below eye; jaws equal anteriorly, fold of lower lip not 

 continuous; cheek with 5 series of scales; 8 or 9 gill-rakers on lower part 

 of anterior arch. Scales 30-32, 4/13, 2^2 between lateral line and base 

 of anterior part of soft dorsal. Dorsal XVII n, the spines increasing 

 in length to the last, which is about ^ the length of head; soft fin, when 

 laid back, extending nearly to middle of caudal. Anal V, 8. Pectoral 

 y^A the length of head; ventral extending to the vent. Caudal sub- 



