PETERSIUS. 239 



10. PETERSIUS SPILOPTERUS, sp. n. 

 Depth of body equal to length of head, 3£ times in total length. 

 Head longer than deep ; jaws equal ; diameter of eye greater than 

 length of snout, 3 times in length of head; maxillary extending to 

 below anterior border of eye ; 18 teeth ('^) in upper jaw, 10 in lower, 

 outer prsemaxillaries alternating with inner. Gill-rakers short, 10 on 

 lower part of anterior arch. Dorsal II 10, originating above ventrals, 

 at equal distance from anterior border of eye and from caudal, 



Fig. 182. 



Petershts spilopterus. 

 Type. 



longest ray shorter than head. Anal III 11. Pectoral £ length 

 of head, not reaching ventral. Caudal forked. Caudal peduncle 

 a little longer than deep. Scales in lateral line 28-30 ||, 2 between 

 lateral line and ventral ; scales above lateral line very much larger. 

 Brown above, silvery white below ; a dark, light-edged lateral band, 

 extending from the eye to the caudal; dorsal fin with a large black 

 spot, anal with blackish longitudinal streaks. 



Total length 60 millim. 



Mouths of Niger and Lagos Coast. 



1-2. Types. Mouths of Niger. Hr. P. Arnold (P.). 



3. Type. Creek at Atijere, 80 miles E. o£ Lagos. Major G. E. Bruce (P.). 



11. PETERSIUS WOOSNAMI. 

 Bonleng. Ann. & Mag. N. H. (7) xx. 1907, p. 487. 



Depth of body equal to length of head, 4 times in total length. Head 

 longer than deep, with convex upper profile ; lower jaw projecting slightly 

 beyond upper; diameter of eye equal to length of snout, 3 times in length 

 of head ; maxillary not extending to below anterior border of eye ; 

 14 teeth (g) in upper jaw, 8 in lower; inner prEemaxillary teeth inserted 

 directly behind the outer. Gill-rakers short, 12 on lower part of anterior 

 arch. Dorsal III 8, originating above base of ventrals and at equal 

 distance from end of snout and from caudal ; longest ray about | length 

 of head. Anal III 17-18. Pectoral shorter than head, not reaching 



