3-4. Yg., types. 



5. Skel. 



6. Hgr., type. 



7. Ad. 



8-10. Hgr. & yg. 



11. Yg. 



12. Ad. 



DISTICHODUS. 

 Stanley Pool. 



Bolobo, Upper Congo. 

 Monsenibe, „ 



" >) 



Upper Congo. 



Lindi River, Upper Congo. 

 Banzyville, Ubanglii. 



271 



M. A. Greshoff (C.) ; 



Utrecht Uni\ ersity (E. ). 

 Rev. G. Grenfell (P.). 

 Rev. J. H. Weeks (P.). 



Brussels University. 

 M. M. Storms (C.) ; 



Brussels Museum (P.). 

 Capt. Royaux (C). 



12. DISTICHODUS ENGYCEPHALUS. 

 Giintli. Cat. Fish. v. p. 361 (1864), and Petherick's Trav. ii. p. 247 (18G9) ; 

 Bouleng. Ann. & Mag. N. H. (7) viii. 1901, p. 513 ; Werner, Sitzb. Ak' 

 Wien, cxv. i. 1906, p. 1129 ; Bouleng. Fish. Nile, p. 148, pi. xxiv. fig-. 2 

 (1907). r F S 



Bistichodus tonteei, Pellegr. Bull. Soc. Zool. France, xxxi. 1906, p. 109. 



Depth of body 2f to 3 times in total length, length of head 4 to 5 

 times. Head but little longer than deep, 2 to 21 times as long as broad ; 



Eig. 207. 



Distichodus engycephalus. 

 Type (P. N.). f. 



snout feebly compressed, projecting very strongly beyond the mouth, its 

 length equal to, or slightly less than, interorbital width ; eye 3 (young) to 

 5 times in length of head, interorbital width 2^ to 3| times; maxillary 

 extending to below nostrils ; teeth in two series in each jaw, outer series 

 containing 18-22. Gill-rakers short, 15-18 on lower part of anterior 



