Dec. 28,1916. FisHes of 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. sieboldit (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 sieboldit Kner & Steindachner, Abhandl. K. Bayer. Ak. Wiss, 
Manchen, X, 1864, 13, Pl. 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 3%. 
Snout as long as postorbital part of head. Diameter of eye 4-5 in 
length of head and 144-2%% 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 9g gill-rakers on lower part 
of anterior arch. Scales 30-32, 4/13, 234 between lateral line and base 
of anterior part of soft dorsal. Dorsal XVII 11, 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 
34-3 the length of head; ventral extending to the vent. Caudal sub- 
