CIIARACIXID.E, 



185 



Add :— 

 IT). All. 



•;. PETERSIUS, llil^'. 

 2. TETERSIUS HI LUENDORFT, BIgr. 



Jfatadi. Lower Congo. Mr. .). Paul Arnol.l (I'.j. 



•2.1. TETEHSIUS AXSORGU. 

 noulong. Ann. & Mag. X. H. (S) vi. ID 10. p. .')i;'.. and Ann. Mus. Congo, Zool. ii. 

 3, p. 8, pi. xvii. fig. -2 (11)12). 



Doptli of body lii to l^f times in total leiigtli, lenytli of head 3^ to 

 4 times. Head as long as deep, with slightly concave upper profile ; 

 lower jaw not projecting beyond upper; snout much shorter than eye, 

 which is 2h to 2| times in lengtli of lu'ud and equals interorbital width ; 



V\''. lis. 



Petersitis ansor(/ii. 

 Type (A. M. C). 



maxillary extending to below anterior border of eye ; outer prgeraaxillary 

 teeth 4, alternating with those of the inner row, 8 in number; 8 teeth 

 in lower jaw. Gill-rakers moderate, 18 to '20 on lower part of anterior 

 arch. Dorsal II S, originating above base of ventral, some of the rays 

 produced into long filaments in males. Anal II-lII 20-23, pointed in 

 males, median ray produced into a filament. Pectoral as long as or a 

 little shorter than head, produced into a filament in fidly developed 

 males. Caudal forked. Caudal peduncle as long as deep. Scales 

 31-33 "Hr^S U-2 between lateral line and ventral. Keddish brown 

 above, more red on the sides, approaching vermilion, silvery bencatli» 



