1906.] 



NATURAL SCIENCES OF PHILADELPHIA. 



445 



all rounded. Head compressed. Snout short, a little broader than 

 long, and edge strongly convex as viewed from above. Mouth broad. 

 No maxillary teeth. Tongue small and hardly free. Interorbital 

 space a little convex. Gill-opening reaches front margin of pupil. 

 Rakers 12 + 17?, slender, about * of orbit and shorter than filaments. 

 Each scale with 1 or more inconspicuous radiating striae. Tubes in 

 lateral line simple. Color in alcohol more or less silvery, and back and 

 upper surface of head brown with pale purple reflections. Jaws pale 

 brownish, also fins, dorsal and caudal hardly darker. Iris brassy. 

 Length 2^ inches. 



Brachyalestes aflSnis (Giinther). Fig. 41. 



Alest-s affinis (Giinther), Proc. Zool. Soc. London, 1896 (February 4), p. 

 223. Shebeli River, Africa. Dr. A. D. Smith. 



Width of head If in its length; interorbital space 2f in head meas- 

 ured from tip of upper jaw. Body well compressed, and edges ap- 

 parently all rounded. Head robust. Snout convex on surface, and 

 obtuse when viewed above. Mouth broad. No maxillarv teeth. 



^"^"'pPy-rC^ 



\^- 



Fig. 41. — Brachyalestes afftnis (Giinther). 



Tongue small and not free. Interorbital space broad and evenly con- 

 vex. Gill-opening reaching front rim of pupil. Rakers 12 + 15, 

 slender, and longest f of pupil. Each scale with many reticulating 

 striae. Color in alcohol faded plain pale brownish, and back and upper 

 30 



