EIGENMANn] south AMERICAN FRESH-WATER FISHES 1 45 



o?.o^, entire; kaOr^:;, a garment; in allusion to the complete denti- 

 tion of the maxillary. 



4. HOLOPRION 

 New genus of Tetragonopterinse, allied to Aphyocarax. 

 Premaxillary and mandible with a single series of pointed teeth 

 with minute cusps on each side ; maxillary with teeth along its entire 

 edge. 



Type. — Chcirodon agassizii Steind. 

 oAoc, entire ; npccov, a saw. 



5. HOLOPRISTIS 

 New genus of Tetragonopterinse, allied to Hemigrammus. 

 Premaxillary with two series of teeth, their crowns ridged, those 

 of the inner series equal ; maxillary with teeth along its entire edge. 

 Lateral line interrupted. Gill-rakers setiform. No predorsal spine. 

 Type. — Tetragonopterus ocellifer Steind. 

 oko:;, entire ; Tzpcazr^^, one who saws. 



6. MARKIANA 

 New genus of Tetragonopterinse, allied to Pcecilurichthys. 



Premaxillary with two series of teeth, their crowns ridged, the 

 teeth of the inner series equal ; maxillary without teeth. Lateral 

 line complete. Gill-rakers setiform. No predorsal spine. Depth 

 more than 2 in the length. Anal and caudal scaled ; anal long, its 

 margin rounded. Scales large, with 7-20 notches. Dorsal distinctly 

 behind the ventrals. 



Type. — Tetragonopterus nigripinnis Perugia. 



I take pleasure in dedicating this genus to my friend and teacher. 

 Dr. Edward L. Mark, for more than twenty-five years at the head of 

 the Zoological department of Harvard University. 



7. MOENKHAUSIA 

 New genus of Tetragonopterinse. 

 Similar to Markiana. Anal naked, caudal scaled. 

 Type. — Tetragonopterus xinguensis Steind. 



For my colleague, Dr. Wm. J. Moenkhaus, formerly of the Museu 

 Paulista, Sao Paulo, Brazil. 



8. OTHONOPHANES 

 New genus of Tetragonopterinse, allied to Brycon. 

 Premaxillary with three series of teeth. Scales equal. Lower 

 lip very broad, pendant. 



