164 EIGENMANN AND WARD 



snout 3.4 in head ; depth of snout in front of eye mucli less tlian 

 its length; depth of head 1.4 in its length. (Steindachner) 



schotti^ 5. 

 aa. Gape short, angle of mouth below anterior nostril ; A. 171 ; only 

 9 transverse scales below dorsal ; lower jaw large, pi^ojecting 

 beyond upper both anteriorly and laterally; eye much nearer 

 tip of snout than gill-opening; depth equaling length of head, 

 8.5 in the length. (Cope) balcBiiops^ 6. 



5. STERNARCHELLA SCHOTTI (Steindachner). 



SternarcJiiis schotti Steindachner, Die Gymnotidce, 4, pi. I, figs. 

 I and 2, 186S, Barra do Rio Negro ; Giinther, Ca:t., VIII, 3, 

 1870; Cope, Proc. Am. Philos. Soc. 1878, 682 (Peruvian 

 Amazon); Steindachner, Flussf. Sudam., II, 42, pi. 2, fig. 

 2, 1881 (Manacapuru) ; Eigenmann & Eigenmann, Proc. U. 

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

 Habitat : Amazons, from the Barra do Rio Negro to Peru. 



6. STERNARCHELLA BAL^NOPS (Cope). 



Sternarchiis balcenops Cope, Proc. Am. Philos. Soc. 1878, 682 

 Peruvian Amazon ; Eigenmann & Eigenmann, Proc. U. S. 

 Nat. Mus., XIV, 1891, 62. 

 Habitat: Peruvian Amazon. 



3. Sternarchogiton Eigenmann, new genus. (Fig. 5.) 



Type : Sternarc/uis iiatte^'ei'i Steindachner. 



Steindachner in his original description recognized that S. 

 nattereri represents a distinct group of Sternarchoid fishes. It 

 is sufficiently distinguished by the absence of teeth in the upper 

 jaw. {^Sternarchiis and yscvcou, neighbor.) 



Geographical distribution of the species : Orinoco to Barra 

 do Rio Negro. 



a. Lower jaw with a single scries of teeth; head 12 ; depth S; snout 

 3.5 in the head; A. 197; anus below eye; snout very short 

 and convex. (Steindachner) iiattcrei-i^ 7. 



aa. Lower jaw without teeth ; A. 16S; head 10.5; depth 13.3; snout 

 pointed; eye 3 in snout; lower jaw projecting; anterior nares 

 in middle of length of snout, the posterior close to eye. (Peters) 



sac/isi^ S. 



