WEST AFRICA 



17 



This species is most nearly related to G. niger, Linn., of which G. jozo, Linn, is 

 probably a synonym, and to G. roulei, De Buen. From both species it may be dis- 

 tinguished by the larger head, fewer scales in a longitudinal series (27-29 instead of 

 33-39)' the long filamentous rays of the first dorsal fin in the male, the number and 

 arrangement of the cutaneous papillae on the head, particularly in the nuchal and 

 infraorbital series, and by the coloration. Further, in G. niger and G. roulei the nape is 

 completely or almost completely without scales. 1 From G. maindroni, Sauvage, from 

 Senegal, Sierra Leone and Niger, it may be distinguished by the larger head and eye 

 and by the coloration. 



Fig. 5. Gobius {Gobiiis) angolensis. Holotype. Ixi. 



Fig. 6. Diagrammatic view of head of Gobius (Gobius) angolensis, showing the arrangement 



of the series of cutaneous papillae. 



Gobius, sp. 



St. 283. 13. viii. 27. Off Annobon, Gulf of Guinea. Large dredge, 18-30 m.: 2 specimens, 17, 

 18 mm. 



Acentrogobius koumansi, sp.n. 



St. 274. 4. viii. 27. Off St Paul de Loanda, Angola. Large otter trawl, 64-65 m. : 44 specimens, 

 30-100 mm. (holotype, 100 mm.). 



St. 279. 10. viii. 27. Off Cape Lopez, French Congo. Large otter trawl, 58-67 m. : 6 specimens, 

 90-105 mm. 



1 An example of this species was sent to Dr Fernando de Buen of Madrid, who has made a special study 

 of the Gobies of this subgenus, and I am greatly indebted to him for his opinion as to its relationships. 



D .XH 



