HETEROTIS.— PANTODON. 



151 



12. Ad. 



13. Skull. 



14. 15. Ad. & hgr, 

 K). Ad. 



17. Hgr. 



18. Ad. 

 19-20. Yg. 

 21. Yg. 



Galeba, Lake Rudolf. 



Sliari River. 



St. Louis, Senegal. 



Gambia. 



Niger. 



Assay, Lower Niger. 

 Benuo R., N. of Ibi. 



Mr. P. C. Zaphiro (C.) ; 



W.N.McMillan,Esq.(P.). 

 Capt. G. B. Gosling (P.). 

 M. P. Delhez (C). 

 J. S. Budgett, Esq. (P.). 

 Mr. J. T. Dalton (C). 

 W. A. Forbes, Esq. (P.). 

 J. S. Budgett, Esq. (P.). 

 H. L. Norton Traill, Esq. 

 (C). 



Fam. 5. PANTODONTIDJ^. 



Margin of the upper jaw formed by the single prsemaxillary and the 

 maxillaries, the former very small ; nasal bones large but not in contact 

 with each other ; parietal bones separating the supraoccipital from the 

 frontals ; praeoperculum and suboperculum absent. Ribs inserted on 

 the strong parapophyses ; epipleurals, no epineurals. Pectoral fin low 

 down, folding against the belly ; mesocoracoid arch slender, strongly 

 curved, meeting its fellow on the median line. Ventral fin with 7 rays, 

 immediately behind pectorals. 



A single genus. 



1. PANTODON. 



Peters, Mon. Berl. Ac. 1876, p. 195 ; Bouleng. Poiss. Bass. Congo, p. 121 (1901). 



Body moderately elongate, compressed, the back, as well as the head, 

 flattened, keeled below ; scales large ; lateral line distinct, canals straight 

 and simple. Mouth large, with small sharp teeth ; similar teeth on the 

 palate (vomer, palatines, pterygoids) and on the tongue. Nostrils widely 

 separated, the posterior large and close to the eye. A very short dorsal 

 fin ; anal fin longer and inserted further forward. Pectoral fin very 

 large, the lower ray adnate to a fleshy process. Vertebrae 16-J-14. 



A single species. 



1. PANTODON BUCHHOLZI. 



Peters, t. c. p. 196, pi. — ; Bouleng. 1. c. ; Popta, Notes Leyd. Mus, xxiii. 1902, 

 p. 111. 



Depth of body -t^ to of times in total length, length of head 4 to 4^ 

 times. Snout shorter than eye, the diameter of which is 3| times in 

 length of head, If times in interocnlar width ; mouth very oblique, 

 directed upwards, extending beyond posterior border of eye. Dorsal 6, 



