CITHAEINUS. 



293 



1. Hgr. 



2. Hgr. 



3. Ad. 



4. Ad. 



5-6. Ad. & yg. 

 7. Skel. 

 8-10. Yg. 

 11-16. Yg. 



17. Yg. 



18. Hgr. 



Hgr. 



&yg- 



19-24. 

 25-26. Yg. 

 27-28. Ad. & hgr. 

 29-31. Ad. & yg. 

 32. Ad. 

 33-42. Yg. 



43. Yg. 



44, 45. Ad. & hgr. 



46. Ad. 



47. Skull. 



48. Yg. 



Lower Nil^. 



Near Cairo. 



Biba, Lower Nile. 



Near Island o£ Arko, Upper 



Nile. 

 Khartum. 



)) 

 Wad Medina, Blue Nile. 

 Mangara, White Nile. 

 Jebelain, ,, 



Mouth of Lake No, White 



Nile. 

 Lake No, White Nile. 

 Yo R., Lake Chad. 

 St. Louis, Senegal. 

 Gambia. 



Agberi, Lower Niger. 

 Assny, „ 



Niger. 



Dr. Ruppell (C). 

 Capt.S. Flower (P.). 

 L. Loat, Esq. (C). 



J. Petherick, Esq. (C.).i 



»» 



L. Loat, Esq. (C). 



Capt. G. B. Gosling (P.). 



M. P. Delhez (C). 



J. S. Budgett, Esq. (P.). 



Lord Derby (P.). 



Dr. W. J. Ansorge (C). 



J. S. Budgett, Esq. (P.). 



Mr. J. T. Dalton (C). 



W. A. Forbes, Esq. (P.). 



Benue R., North of Ibi. H. L. Norton Traill, Esq. (C). 



2. CITHAEINUS CONGIOUS. 



Bouleng. Ann. & Mag. N. H. (6) xx. 1897, p. 424, and Poiss. Bass. Congo, p. 202 

 (1901). 



Depth of body If to 2 times in total length, length of head 3 to 3|- 

 times. Head twice as long as broad, upper profile feebly concave ; 

 snout short, not twice as broad as long, a little longer than eye in adult, 

 projecting slightly beyond mouth ; eye 3^ (young) to 5 times in length 

 of head ; a narrow adipose lid in front of and behind eye ; interorbital 

 width f to "I- length of head. Gill-rakers extremely short, 30-40 on 

 lower part of anterior arch. Dorsal 18-21 (4-5 unbranched), originating 

 above last ray of ventral, falciform, anterior rays produced, at least as 

 long as head. Adipose fin not or but little longer than deep, its base 

 •g- to -I its distance from dorsal. Anal 25-30 (3 unbranched), pointed, 

 anterior rays produced. Pectoral f to |- length of head, reaching ventral. 

 Caudal deeply forked. Caudal peduncle a little longer than deep. Scales 



