27. CEEAGRUTU3. 339 



1. Bryconops albumus. 



Bryconops albumoides (!), Kmr, I. c. 

 albumus, Kuer, taf. 9. fig. 22. 



D. 11. A. 32-33. V. 9. L. lat. .55-60. L. transv. 9/4. 



The height of the body is somewhat more than the length of the 

 head, and two-ninths of the total (without caudal). Sides with a 

 bright, sliining silvery longitudinal band ; middle and margin of the 

 caudal fin black. (Knet:) 



Rio Guapore. 



2. Bryconops lucidus. 



Kner, I. c. p. 181. fig. 23. 



D. 10. A. 38. V. 9. L. lat. 62. L. transv. 9/-4. 



The height of the body is one-fourth of the total length (without 

 caudal), the length of the head one-fifth. Sides with a silver}- lon- 

 gitudinal band. Only the upper caudal lobe has a dark margin. 

 {Kner.) 



Rio Branco. 



27. CREAGRUTUS. 

 Dorsal fin placed in the middle of the length of the body, imme- 

 diately behind the ventrals ; anal of moderate length. Body oblong, 

 compressed, covered with scales of moderate size. Lateral line dis- 

 tinct. Belly rounded. Cleft of the mouth of moderate width ; teeth 

 more or less compressed and notched, in three scries in the upper 

 jaw, and in a single in the lower ; maxillary with a few blunt teeth ; 

 palate toothless. Nostrils close together. Gill-openings wide, the 

 gill-membranes not being attached to the isthmus ; giU-rakers short, 

 lanceolate. 



1. Creagnitus mulleri. 

 Leporinus mulleri, Giinth. Proc. Zool. Soc. 1859, p. 92. 

 B. 4. D. 11. A. 14. V. 8. L. lat. 39. L. transv. 5/3. Vert.i^. 



This fish has externally the appearance of a Leucisens. The height 

 of its body is contained thrice and one-third in the total length, the 

 caudal fin not included ; the length of the head four times. The 

 snout is rather short and obtusely convex, not longer than the dia- 

 meter of the eye, which is one-fourth of the length of the head. 

 Interorbital space entirely osseous, rather convex, its width being 

 more than the diameter of the eye ; the lower infraorbital is much 

 chlated, as wide as the eye, and touches the lower prjcopercular limb, 

 but not the angle. The front scries of intermaxillary teeth is com- 

 posed of three pairs of small subconical teeth, the second series of 

 two pairs, and the hinder series of four pairs ; the latter are the 

 largest, and provided with two or three points. ^landible with three 

 pairs of strong front teeth, and with some small ones on the sides. 



z 2 



