HETEEOTIS.— PANTODON. 151 



i2- Ad. Galeba, Lake Rudolf. Mr. P. C. Zapliii-o (C.) ; 



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



13. Skull. Sliari River. Capt. G. B. Gosling (P.). 



14, 15. Ad. & hgr. St. Louis, Senegal. M. P. Delhez (C). 



!*'• Ad. Gambia. J. S. Budgett, Esq. (P.). 



17. Hgr. Niger. Mr. J. T. Dalton (C). 



18. Ad. „ W. A. Forbes, Esq. (P.). 

 19-20. Yg. Assay, Lower Niger. J. S. Budgett, Esq. (P.). 

 21- Yg. Benue R., N. of Ibi. H. L. Norton Traill, Esq. 



(0.). 



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-|-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 3^ to 3f 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 interocular width; mouth very oblique, 

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



