CIIAEACINKLE, 



185 



Add :— 



15. Ad. 



G. PETERSIUS, Hilg. 

 2. PETERSIUS HILGENDORFI, BIgr. 



Matadi, Lower Congo. Mr. J. Paul Arnold (P.). 



2 a. PETERSIUS ANSOEGII. 

 Bouleng. Ann. & Mag. N. H. (8) vi. 1910, p. 513, and Ann. Mus. Congo, Zool. ii. 

 3, p. 8, pi. xvii. fig. 2 (1912). 



Depth of body 2| to 2f times in total length, length 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 2| to 2§ times in length of head and equals interorbital width ; 



Fig. 118. 



Petersius ansorgii. 

 Type (A. M. C). 



maxillary extending to below anterior border of eye; outer praemaxillary 

 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 8, originating above base of ventral, some of the rays 

 produced into long filaments in males. Anal II— III 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 fully developed 

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

 31-33 4=r-\ H-2 between lateral line and ventral. Eeddish brown 

 above, more red on the sides, approaching vermilion, silvery beneath. 



