480 Dr. A. Giinther on some new Freshwater Fishes 
Leporinus hypselonotus. 
D. 10.° A..18.° V.. 9." Te JatS7-38. Lis tenes are 
The height of the body is contained twice and one-half or 
twice and two-thirds in the total length (without caudal), the 
length of the head four times and one-half or four times and 
two-thirds. Back much elevated, with its profile very convex 
to the dorsal fin. Body with seven more or less broad, 
oblique, blackish cross bands—the two anterior in front of the 
dorsal, the third from the anterior dorsal. rays to behind the 
ventral fins, the fourth corresponding to the vent, the fifth to 
the middle of the anal, the sixth from the adipose fin, and the 
seventh round the last caudal scales. Anterior part of the 
base of the dorsal and the ventrals deep black, the other fins 
yellowish. 
Xeberos. 
Tetragonopterus ovalis. 
D.11. A.26; L. lat. 31. 1. transv. 53/6. 
The height of the body is one-half of the total length (with- 
out caudal); the length of the head is contained thrice and 
two-thirds in it. Upper profile rather more convex than 
lower, slightly concave on the nape. The diameter of the 
eye is more than the width of the interorbital space, less than 
the length of the snout, and one-third of that of the head. 
The maxillary extends somewhat beyond the vertical from 
the front margin of the orbit. Origin of the dorsal fm imme- 
diately behind the root of the ventral. Pectorals extending 
beyond the ventrals, ventrals to the vent. There are four longi- 
tudinal series of scales between the lateral line and ventral fin. 
Xeberos. 
APHYOCHARAX, g. N. 
This genus belongs to the Tetragonopterina, and is, tech- 
nically, fistingwishod from Chirodon by the presence of max- 
illary teeth. 
Dorsal fin placed in the middle of the length of the body, 
behind the ventrals; anal rather long. Body oblong, covered. 
with scales of moderate size. Lateral line visible on a part 
of the scales only. Abdomen rounded before the ventrals. 
Cleft of the mouth narrow; maxillary short; intermaxillary, 
maxillary, and mandibles with a single series of pointed teeth’ 
those in the intermaxillary having a minute lobe on one or 
both sides; all the others appear to be simply pointed. 
Aphyocharax pusillus, 
D.9. A.18. V.8. L.dat. 36. UL, transye ag: 
Huallaga and Xeberos. 
