538 



PROCEEDINGS OF THE ACADEMY OF 



[Oct. 



Snout short, convex in profile and over surface, its length about 

 half its width. Eye large, ellipsoid, but little elevated and centre 

 near first third in head. Pupil moderate, rounded. Eyelids free, 

 not adipose-like. Mouth broad, with short commissure, superiorly 

 terminal. Maxillary almost vertical, not quite extended to eye 

 or opposite lower edge of eye, and free. Lips fleshy, upper firm, 

 lower thicker and more free. Teeth in upper jaw biserial, 8 in each 

 series, anterior smaller and tricuspid though in an even row parallel 



Fig. 10. — Ctenobrycon rhabdops Fowler. (Type.) 



with posterior, and latter larger and mosth' quincuspid, No maxil- 

 lary teeth. ^Mandibular teeth a single series of 8, symphyseal pair 

 largest with others moderately graduated smaller on each side 

 posteriorly, larger quindentate and smaller tridentate. Inner 

 buccal folds broad. Tongue depressed, rather broad and smooth, 

 pointed and free in front. Mandible strong, protrudes slightly in 

 front, and rami little elevated inside mouth. Nostrils together, 

 rather large, placed within last half of snout length close before eyes 

 above, anterior simple pore and posterior larger crescentic -slit. 

 Interorbital broadly convex. Preorbital small, and infraorbital 

 very large, completely covers cheek, its surface smooth. Hind 



