DEC. 28, 1916. FISHES OF PANAMA MEEK AND HILDEBRAND. 311 



36. Genus Eigenmannia Jordan & Evermann. 



Cryptops Eigenmann, Ann. N. Y. Ac. Sci., VII, 1894, 626 (type Sterno- 

 pygus humboldtii Steindachner=S/ernarc/ws virescens Valenciennes). 

 (Name preoccupied.) 



Eigenmannia Jordan & Evermann, Bull. U. S. Nat. Mus., XLVII, 1896, 

 341. (Substituted for Cryptops.) 



This genus is distinguished from Sternopygus by the absence of a 

 free orbital margin. Body elongate, compressed; head rather small; 

 snout blunt; mouth small; jaws equal, or the lower included; a large 

 frontal and parietal fontanel present; eyes medium, covered by a 

 transparent membrane; teeth in upper jaw in 2 almost confluent patches, 

 those of lower jaw in 2 lateral patches; scales small, cycloid; lateral line 

 complete; origin of anal back of vertical from origin of pectorals; caudal 

 filament moderate or long. Size moderate, not exceeding 400 mm. 



52. Eigenmannia virescens (Valenciennes). 



Sternarchus virescens Valenciennes, in d'Orbigny, Voy. Ame'r. Me*rid., 



V, Pt. 2, 1847, u, PI. 13, fig. 2. 

 Sternarchus virescens Muller & Troschel, in Schomburgk, Reisen in 



Britisch-Guiana, Fische, III, 1848, 640 (Guiana); Gunther, Cat. 



Fish. Brit. Mus., VIII, 1870, 7 (Surinam). 

 Sternopygus lineatus Muller & Troschel, in Schomburgk, Reisen in 



Britisch-Guiana, Fische, III, 1848, 640 (Guiana). 

 Sternopygus tumijrons Muller & Troschel, Horae Ichthyol., Ill, 1849, 14. 

 Sternopygus humboldtii Steindachner, Denkschr. K. Ak. Wiss. Wien, 



XXXIX, 1878, 71, PI. XIV (Rio Magdalena). 

 Cryptops virescens Eigenmann, Ann. N. Y. Ac. Sci., VII, 1894, 626. 

 Cryptops lineatus Eigenmann, Ann. N. Y. Ac. Sci., VII, 1894, 635. 

 Cryptops humboldtii Eigenmann, Ann. N. Y. Ac. Sci., VII, 1894, 625. 

 Eigenmannia humboldtii Jordan & Evermann, Bull. U. S. Nat. Mus., 



XLVII, 1896, 341. 



Head 6.05 to 7.15 in length to end of anal fin; depth 5.7 to 7; A. 



165. 



Body elongate, compressed; dorsal profile of head and body convex; 

 head short; snout blunt, its length 2.85 to 3.3 in head; eye moderate, 

 4.9 to 5.7; interorbital 3 to 3.2; mouth small; jaws subequal, the lower 

 included, at least on sides; maxillary about equal to length of eye; teeth 

 in the upper jaw in 2 nearly confluent patches, those in lower jaw in 

 2 lateral patches; vent about one-half diameter of eye behind vertical 

 from posterior margin of orbit; caudal filament in our small specimen 

 flat, ribbon-shaped and more than half the length of anal, lost in the 



