8 poLYPTp:Kii).-f:. 



length 4 J to 5 J times in total length ; lower jaw projectins: 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 



Fiir. 4. 







/ 





^"^c, \ ^-w' . ^. ^:f. 



) 



PoJ'/jiterus lajtrad'ii. 

 Head uf type, after JStoindacliner (Sitzb. Ak. "Wien, 180'.)). J. 



spiracular shields; suboperculum much larger than eye. Dorsal with 

 XIII-XV spines, anterior more or less overlai)])ing wlien folded. Anal 

 n-15. Pectoral reaching vertical of first dorsal spine, or a little 

 beyond. GO-68 scales in a longitudinal series, ll-lo between occipital 

 and first dorsal spine, 40-52 round middle of body. Yellowibh or pale 

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

 dark spots or streaks. 



Total length 740 milliin. 



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



1. A<1., .stflra. Senegal. 



^^ Ad. St. Louis, Senegal. .M. P. Delhez (C). 



a-lO. A.l. & ligr. Kacdi, Seneoal. 



11. Hgr., sttfd. Ganilua. P. Wl,it(ield, Esq. (P.). 



!-• llg''- „ J. S. Budgett, Esq. (P.). 



l-^- Ad. „ ('apt. Vipan (P.). 



14. Yg. Abo, Lower Niger. Dr. W. J. Ansorge (C). 



^5-17. Yg. Assay, 



1«, 1^- llgr. Niger. Mr. J. T. Dalton (('.). 



20-26. Ad., hgr., k yg. „ W. A. Forl)es, Esq. (P.). 



27. Ad., skel. 

 2^. Hgr. Benue River, N. of ll>i. Jl. L. Norton Traill, Es.p 



