THE GWMNOTID^ I7I 



8. Steatogenes Boulenger. (Fig. ii.) 

 Stcatogcnes Boulenger, Trans. Zool. Soc. London, XIV, 1898, 

 428. 



Type : Rhamfhichthys cicgans Steindachner. 

 a. Head chubby, upper profile convex; head 1.5 in the depth. A. 

 165 to 176 (Steindachner) elegans^ 20. 



20. STEATOGENES ELEGANS (Steindachner). 

 Rham^hichthys (JBrachyrhamfhichthys) clegans Steindachner, 



Fisch-f. Cauca and Guayaquil, 37, 1880, Barra do Rio Negro. 

 Brachyrhamfhichthys clegans, Eigenmann & Eigenmann, Proc. 



U. S. Nat. Mus.,^XIV, 1891, 62. 

 Stcatogenys clegans, Boulenger, Trans. Zool. Soc, XIV, 428, 



1898 (Rio Jurua). 

 Rhamphichthys [Brachyrha^nphichthys^ 7nirabilis Steindachner, 



/. c., pi. IX, figs. I and la. 



Habitat : Barra do Rio Negro. 



9. Eigenmannia Jordan & Evermann. (Figs. 14 and 16.) 



Stcrnopygus Miiller & Troschel, Horce Ichthyol., Ill, 13 (spe- 

 cies). 



Cryptop Eigenmann, Ann. N. Y. Ac. Sci.,VII, 626 {himi- 

 boldtti) ; preoccupied. 



Eigenmannia Jordan «&; Evermann, Fishes North and Mid. 

 Amer., I, 341, 1896 (substituted for Cryptops). 

 Type : Sternofygiis Jmmboldtii Steindachner. 

 Geographical distribution of the species : On the eastern slope 



from Magdalena to La Plata, Pacific Slope of Panama. 



a. " Maxillary shorter than the diameter of eye; eye without free 

 lid, a little longer than snout or interocular space; mouth very 

 narrow; upper jaw overlapping lower ; upper profile of head 

 descending in a curve ; vent a little behind vertical of posterior 

 border of eye; pectoral fin as long as head minus snout; A. 175, 

 originating below middle of pectoral ; depth of body greater than 

 length of head, 7.5 in length to end of anal ; tail produced be- 

 yond anal in a very long appendage terminating filiform and 

 measuring half total length without head ; scales very small. 

 Uniform pale brownish; anal fin white." (Boulenger.) 



macrops, 2 r . 



aa. Maxillary about equal to orbit, the mouth small. 



