SOUTH AMERICAN* FI>nE> 



35 



y . I'revenrrai area not treiichaiit. more or less narrowlj- roiiudeil : 

 adiiK>se lin present. (Hysteronotina?>. 



d. Three lowest caudal rays separate tii»m the rest of the fin in the 

 male, the scpiamons i)onch surrounding them and extending on the base of 

 the lower caudal lol>e only. 



e. Anal with 30-34 rays ; lateral line complete. V. Gcphyroclutrax. 

 ee. Anal IS: lateral line incomplete. VI. Microbrycon. 

 dd. Lower caudal rays not separate. (Bryconamerieus henni and 



Aigoplem a of the Tetragonopterinje l . 



f. Sv]naiir:«ns ix>ueh in male > .u The l-'wer half of caudal : lateral line 

 c! mplere : A. ::'>l-32. 



g- Maxillary and mandibular teeth nrri lie^l. The middle fMjint longest 

 and most prominent. TIL Hystcronotus. 



(gg. Maxillary and mandible vriTh very br(>ad tippeil Teeth. 



Landonia of the Teti-agonopteriniie ) . 



ff. Svinamons pouch in male on upper half of caudal. A. 2«5-34. 



h. Lateral line incomplete. Till. Glandulocattda. 



hh. Lateral line c-omplete. 7T. Coeliirichthys. 



T:i Ti:- al'MV- k^^y I have f^r couveinence retained the subfamily 

 lie..::.'- .;l-1'-:- v.- 11 The .species have been considered in the past. 



