APPENDIX C. 
259 
CYFRINIDJE. 
Labeo. 
Scales of moderate or small size. Dorsal fin without osseous 
ray, with more than nine branched rays, eommencing somewhat in 
advance of the ventrals. Snout obtusely rounded, the skin of the 
maxillary region being more or less thiekened, forming a projection 
beyond the mouth. Teeth none in the jaws. Mouth transverse, 
inferior, with the lips thickened, each or one of them being pro- 
vided with an inner transverse fold, which is covered with a de- 
ciduous horny substance forming a sharp edge, which, however, 
does not rest upon the bone as base, but is soft and moveable. 
Barbels very small, two or four, the maxillary barbels more or less 
hidden in a groove behind the angle of the mouth. Anal fin very 
short. Snout generally more or less covered with hollow tubercles. 
Labeo niloticus, Forsk. {Lebis ; Lebse.) 
D. 16 — 19. A. 8. L. lat. 40 — 43. L. transv. 
Mouth rather broad. Lips thin, fringed, with an inner fold in 
their entire circumferenee, more distinet on the upper lip than on 
the lower. Snout obtuse, moderately projecting, with a very in- 
distinct lobe on eaeh side ; maxillary barbel minute, hidden in a 
lateral groove. Eye of moderate size, not much smaller than a 
scale, situated before, or, in old examples, in the middle of the 
length of the head. There are four or five longitudinal series or 
seales between the lateral line and the ventral fin. Upper margin 
of the dorsal fin coneave, the third and fourth rays being the 
17 — 2 
