S POLYPTEKID.E. 



length 4£ to 5| times in total length ; lower jaw projecting a little 

 beyond snout; eye supero-lateral, its diameter 8 (young) to 12 times in 

 length of head, 2 to 3J times in width of interorbital region, which is 

 quite flat and not less than the distance from eye to spiracle ; all head- 

 shields paired ; a series of 4 to 6 shields between postorbital and 



Fie. 4. 



tSpSSjgSvS 



tfe^S^ 



Pol(j2>teriis lapradii. 

 Head of type, after Steindachner (Sitzb. Ak. Wien, 18(51)). \. 



spiracular shields ; suboperculum much larger than eye. Dorsal with 

 X1II-XV spines, anterior more or less overlapping when folded. Anal 

 3 1—15. Pectoral reaching vertical of first dorsal spine, or a little 

 beyond. 60-68 scales in a longitudinal series, 11-13 between occipital 

 and first dorsal spine, 46-52 round middle of body. Yellowish or pale 

 olive, with dark stripes and more or less distinct cross-bars ; fins with 

 dark spots or streaks. 



Total length 740 millim. 



Senegal, Gambia, Niger. — Types in Vienna Museum. 



1. Ad., stffd. Senegal. 



2. Ad. St. Louis, Senegal. 

 3-10. Ad. & hgr. Kaedi, Senegal. 



11. Hgr., stffd. Gambia. 



12. Hgr. 



13. Ad. 



14. Yg. 

 15-17. Yg. 

 18, 19. Hgr. 

 20-26. Ad., hgr., & yg. 



27. Ad., skel. 



28. Hgr. 



Abo, Lower Niger. 

 Assay, „ 



Niger. 



M. P. Delhez (C). 



P. Whitfield, Esq. (P.). 

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

 Capt. Vipan (P.). 

 Dr. W. J. Ansorge (C). 



Mr. J. T. Dal ton (C). 



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



Benue River, N. of Ibi. H. L, Norton Traill, Esq. 



