50 



MORMYRIDjE. 



Petrocephalus sauvagii, Bouleng. Proc. Zool. Soc. 1898, p. 788, and Poiss. Bass. 

 Congo, p. 70 (1901). 



Depth of body 2f to 3^ times in total length, length of head 3§ 

 to 4 times. Head as long as deep, with straight, feebly declivous upper 

 profile ; snout very short, \ to \ length of head, obliquely truncate, 

 projecting beyond mouth ; mouth situated below anterior border of the 

 eye, its width -f- or ^ length of head ; teeth bicuspid, 20-26 in upper 

 jaw, 28-30 in lower ; eye large, its diameter greater than length of snout, 

 equal to interorbital width. Dorsal 28-31, originating above 4th to 7th 

 ray of anal, its length a little more than half its distance from head. 

 Anal 35-38, equally distant from base of ventral and base of caudal, or 



Fig. 35. 



r ^^^t^f^pW^^mm^s^ 



Petrocephalus sauvagii. 

 Type. f. 



slightly nearer latter. Pectoral pointed, about § to f length of head, 

 twice as long as ventral, and extending beyond base of latter. Caudal 

 scaled at the base, with pointed lobes. Caudal peduncle 3 times as long 



9-12 



in 



as deep, f- to f length of head. 40-40 scales in lateral line, i 



transverse series on body, 10=12 in transverse series between dorsal and 

 anal, 12 round caudal peduncle. Plumbeous above, silvery white below ; 

 a round blackish spot sometimes present below origin of dorsal. 



Total length 190 millim. 

 Lower Congo, Old Calabar. 



1. 



Type. 



Lower Congo. 







2. 



Ad. 



Loango, Lower ( 



'onf^o. 





Ad. 



Boma, 



5) 





i. 



Skel. 



?i 



51 





5. 



Hgr. 



Matadi, 



?J 





M. F. Hens (C). 

 M. De Mouse (C). 

 M. P. Delhez (C). 



Capt. Wilverili (C). 



