1903.] NATURAL SCIENCES OF PHILADELPHIA. 349 



than the filaments, which are a httle less than half the eye. Pseudo- 

 branchiae rather short. 



Peritoneum pale. 



Scales of more or less even size, and finely ciliated, ^^ertical fins 

 mostly scaly. Small scales crowded at the humeral region, at the 

 base of the pectoral, and out on the basal portion of the fin. A flap 

 composed of a few small scales at the axil of the pectoral. A few 

 pointed scales at the base of the ventral, but not free. Lateral line 

 nearly concurrent with the dorsal profile, composed of simple tubes, 

 and extending well out on the caudal basally. 



Origin of the dorsal inserted well behind that of the pectoral, the 

 spines graduated to the fourth which is the longest, the first a little 

 longer than eleventh, and the twelfth about equal to the second. 

 Origin of the soft dorsal about midway between that of the spinous 

 dorsal and the base of the caudal, and the anterior rays the longest. 

 Spinous anal inserted a trifle behind the origin of the soft dorsal, the 

 second spine the longest, much longer than the first or longest ray, 

 and the base of the rayed fin a trifle over half its height. Pectoral 

 pointed, reaching about three-quarters of the distance to the anal. 

 Ventral inserted behind the pectoral, reaching a])out three-quarters 

 of the distance to the anus, and the spine aliout two-thirds the 

 length of the fin. 



Color in alcohol brown alcove, pale beneath. About eight vertical 

 brown bands or bars along the side of the body, extending till opposite 

 the base of the pectoral. 



Length Gf^ inches. 



One example. 



I do not accept Pcrca nohilis Linnseus^ as the earliest available name 

 for this species, as he states D. |f , A. 3%! MM. Jordan and Feslar con- 

 tend that it is probably intended for this species, though they admit 

 that there is less doubt al^out the name 'plumieri? 



CIOHLID^. 



HEROS HeckeL 



1841. Zool. Abhand. Annel. Wien. Mus. Nat.. 1841, p. 362. 



Type Heros severus Heckel, I. c. "Marabitanas im Rio-negro." 

 (Coll. M. Natterer.) 



3. Heros urophthalmus Giinther. 



1862. Heros uwphthaJmus Giinther, Cat. Fish. Brit. Mus., IV, p. 291. "Lake 

 Peten." [Guatemala.] (Coll. MM. Salvin and Godman.) 



Head 2^; depth 2^; D. XVI, 11; A. VI, 9; scales 30 in a lateral 



1 Syst. Nat., Ed. X, I, 1758, p. 291. 



2 Rep. U. S. Fish. Comm., XVII. 1893, p. 488. 



