70 MEMOIRS OF THE CARNEGIE MUSEUM. 



Range : Magdalena and Atrato basin, Atlantic slope of Panama. 



5367, C. M., 13042, 1. U. M., many, largest about 25 mm. Truando. Wilson. 

 726, Universitj' of Michigan Museum, two, largest about 28 mm. Marsh at 

 Fundacion, Colombia. 



Head 4; depth 2.5-3; D. 10 or 11; A. 17-20; scales 28-32, of which about 

 six have pores; eye 3 in head, about equal to interorbital. 



Compressed, breast slightly flattened, with a median series of nine or ten 

 scales; predorsal area with about nine scales; occipital process short, reaching 

 about one-sixth to the dorsal ; frontal fontanel an equilateral triangle less than one- 

 half as long as the parietal fontanel without the groove; maxillary reaching to below 

 anterior margin of eye; third suborbital covering the entire cheek; premaxillary 

 with five teeth; maxillary with two or three teeth. 



Dorsal falcate, sometimes reaching to adipose, its origin in middle of body; 

 anal emarginate, its lobe in the male reaching tip of last ray, not quite tip of last 

 ray in female; ventrals reaching beyond origin of anal in male, the pectorals to the 

 middle third of the ventrals; both fins shorter in the female. 



Scales regularly imbricate, largest just above pectorals and ventrals; caudal 

 naked; anal with a single series of scales along its base; ten scales between dorsal 

 and ventrals. 



Interhsemals extending from near base or tip of last anal ray to caudal, eight to 

 twenty-three in number, those of the males antrorse and with lateral wings, those 

 of the female slender, their tips not exposed, pointing downward and backward. 



A conspicuous caudal spot, surrounded by an unpigmented area; back and 

 sides nearly uniformly punctate; margin of anal and dorsal dark. 



37. Cheirodon parahybae sp. nov. (Plate XI, fig. 2.) 

 6841a, C. M., type, 38 mm. 6841b-f, C. M., paratypes, six, largest 39 mm. 



Campos, June 14, 1908. Haseman. 

 Head 3.75-4; depth 2.5-2.7; D. usually 11, rarely 10; A. 19-24; scales 34-36, 

 eight or nine with pores; eye 2.5 in the head. 



Compressed, preventral area and predorsal areas rounded, the somewhat 



C. insignis C. gorgonce 



Head 3.6-3.8 3.5-3.8 



Depth 2.8-3 3-3.2 



Eye in the head 2.5-2.6 2.2-2.45 



Longest dorsal ray in liead 8 1 



Anal 21-22 17-10 



Longest anal ray in head 1.4-1.8 1.4-1.0 



