398 MEMOIRS OF THE CARNEGIE MUSEUM 



second suborbital leaving a naked area between it and the maxillary, none between 

 it and the limbs of the preopercle. Snout pointed, mouth little oblique, a distinct 

 angle between the horizontal premaxillary and the maxillary; premaxillary- 

 maxillary border half as long as the head; maxillary with about eight conical 

 teeth along its entire anterior border, one of the teeth directed forward and out- 

 ward; premaxillary with a forward directed process at its tip, an outer series of 

 two and inner series of six subequal conical teeth, none of which are canines ; lower 

 jaw with an inner series of subequal, irregularly graduate teeth, and an outer 

 series of four large conical teeth on each side, the second of which is directed for- 

 ward as well as upward. 



Gill-rakers 7 + 9, all but the lowermost one of the upper arch minute, those 

 of the lower arch about one-fourth of the orbit. 



Scales regularly imbricate, smallest on the breast, each with several longi- 

 tudinal striae; fins naked; lateral line decurved in front. 



Origin of dorsal a little nearer to base of caudal than to tip of snout, its highest 

 ray 4.5 in the length; caudal lobes about 3 in the length; anal emarginate, its 

 origin nearer to caudal than to base of pectoral; ventrals reaching anal, pectorals 

 to ventrals. 



Upper parts and caudal bright yellow, a bright silvery band between the 

 black spots, lower parts suffused with red; dorsal red in the middle, then yellow; 

 an orange streak from base of first anal ray to the tip of the third or fourth; middle 

 half of second and third ventral rays red. A large black spot covering more than 

 thirty scales, its center over the ninth scale of the lateral line; a large black spot 

 covering the entire sides of the caudal peduncle. 



Rceboides Gtinther. 

 Rceboides Gunther, Catalogue, V, 1864, 345 (mierolepis and guatemalensis) .— 



Eigenmann, Proc. U. S. Nat. Mus., XIV, 1891, 57. 

 Rhceboides Berg, Com. Mus. Nac. Buenos Aires, 5, 1899, 94. 

 Cynocharax Fowler, Proc. Acad. Nat. Sci. Phila., 1906, 457 (affinis). 



Type, Epicyrtus mierolepis Reinhardt. 



Teeth all small, conical or tricuspid, in a single series on the maxillary and 

 sides of the mandibles, in two imperfect series on the premaxillary and sometimes 

 the front of the mandible; middle teeth of premaxillary slightly enlarged; maxil- 

 lary with teeth along its entire margin or not; anterior teeth of the mandible and 

 one on each corner slightly enlarged; several larger tooth-like prongs projecting 

 forward from the upper jaw at the margin of the lip; maxillary frequently with 



