PETEESirS, 



23E 



in lower jaw. Gill-rakers short, 15 or 16 on lower part of anterior arch. 

 Dorsal II 8, originating above base of ventral, at equal distance from 

 end of snout and from caudal ; some of the rays produced into long 

 filaments in males. Anal III 20-23. Pectoral f to f length of head, 



Tw. 176. 



Petersius Jiilgendorfi. 

 Type (A. M. C). f . 



nearly reaching ventral. Caudal forked. Caudal peduncle hardly 

 longer than deep. Scales 35-36 gf, 2 between lateral line and root of 

 ventral. Dark brown above, silvery beneath ; a dark lateral band on 

 posterior two-thirds of body ; a vertical black bar above pectoral ; fins 

 black. 



Total length 100 millim. 



Upper Congo (Lake Leopold II. and Alima Eiver), Ogowe. — 

 Types in Congo Museum, Tervueren. 



1-2. Types. Kutu, L. Leopold 11. M. P. Delhez (C). 



3-4. Types. Ibali, „ „ 



h-G. Ho;r. Gaboon. 



3. PETERSIUS CONSERIALIS. 

 Hilgend. Sitzb. Ges. naturf. Fr. Berl. 1894, p. 173 ; PfefE, Thierw. O.-Afr., 

 Fische, p. 44 (1896). 



Depth of body 2f times in total length, length of head nearly 4 times. 

 Head a little longer than deep, upper profile concave ; lower jaw 

 projecting beyond upper; snout a little shorter than eye, which is 

 3J times in length of head and equals interorbital width; maxillary 

 extending to below anterior border of eye ; outer prsemaxillary teeth 4, 

 almost on a line with and alternating with those of the inner row, 8 in 

 number; 8 teeth in lower jaw. Gill-rakers rather short, 18 on lower 



