68 Annals of the Carnegie Museum. 



than the caudal, the penultimate ray almost one-third of the longest, 

 which is three to three and one-half in the length. Caudal equal to 

 the head. Origin of the anal on vertical from the middle dorsal ray ; 

 anal emarginate, the longest ray 1.5-2 into the base. Rays very 

 close together. Ventrals on the vertical from the first scale in front 

 of the dorsal. Ventrals just reaching the first or second anal rays. 

 Pectorals reaching a little beyond the base of the ventrals. 



Humeral and caudal spots lacking. Scales of the back outlined 

 with dusky. The entire sides except over the body-cavity with scat- 

 tered chromatophores, which are a little thicker on the caudal peduncle 

 and on the third and fourth scales of the lateral line and the three 

 scales above them. The chromatophores are thinner over a small 

 vertically elongate area immediately behind the humeral area just 

 described. The lateral stripe very slender, extending entirely to the 

 caudal. Dorsal with a round intensely black spot on the first seven 

 rays ; the tips of the second and third rays white. The distal half of 

 the longest anal ray and the tip of the next ray also white. All the 

 fin-rays dusky. Scales on the sides with a pale blue iridescence. In 

 life, a general rosy tinge, especially above anal, base of caudal lobes, 

 and ventrals. Anal lobe and base and tip of dorsal lobe bright orange. 



Hyphessobrycon minimus sp. nov. 



Type, 18 mm. (No. 1193 Carnegie Museum Catalog Fishes.) 

 Cane Grove Corner. 



Cotypes, from 16-21 mm. Cane Grove Corner. (I. U. Cat. No. 

 11769.) 



Distinguished by intense caudal spot only slightly continued upon 

 the caudal rays ; a narrow black lateral stripe from the first or second 

 scale in front of the caudal spot to the top of the preopercle, a little 

 wider and less intense in the humeral region ; no real humeral spot. 

 Head at base of occipital process about | of the greatest depth ; occip- 

 ital process short. 



Head 3J-3I, depth 3i~3i : D - n, A. 16 or 17 ; scales 5-30 

 to 33-3 ; eye 2 -f in head ; snout less than the eye ; interorbitals less 

 than eye, about 3 in the head. 



Compressed, head at base of occipital process |, or equal to the great- 

 est depth. Preventral region rounded without regular complete series 

 of median scales. Postventral region narrow. Predorsal region 

 rounded, with a regular series of nine or ten median scales almost reach- 

 ing the occipital process. 



