PETERSIUS. 239 



10. PETERSIUS SPILOPTERUS, sp. n. 

 Depth of body equal to length of head, 5^ 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 (jq) 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. 



y 



Petersnts spilojpterus. 

 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 Gr. E. Bruce (P.). 



11. PETERSIUS WOOSNAMI. 

 Bouleng. 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 



