PETEHSIUS. 



233 



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, 



ri 2 . 176. 





Petersius hilgendorfi. 

 Type (A. M. C). f 



nearly reaching ventral. Caiidal forked. Caudal peduncle hardly 

 longer than deep. Scales 35-36 yf, 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 River), Ogowe. — 

 Types in Congo Museum, Teivueren. 



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



3-4. Types. Ibali, „ „ 



b-ij. Hgr. Gaboon. 



3. PETERSIUS CONSEEIAL1S. 

 Hilgend. Sitzb. Ges. naturf. Fir. Berl. 1894, p. 173 ; Pfeff. Thierw. 0.-A£r., 

 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 prae maxillary 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, IS on lower 



