318 CYPJIINIDJ^.. 



J length of head, at least as long as and often longer than postocular 

 part of head ; eye nearly perfectly lateral, 4J to 7 times in len^^th of 

 head in adnlt, 3 to 4 times in young ; interorbital width J to f length 

 of head ; width of mouth, with lips, 2 to 3 times in length of head ; 

 lips not distinctly fringed on the edge, with small papillse forming 

 transverse plicae on inner side ; rostral tiap large, completely detached 

 at the sides, its edge entire or feebly denticulate ; a minute barbel, 

 usually hidden under folds of skin ; tubercles on the snout, or their 

 crater-like scars, much developed in adult. Dorsal III 12-13 (rarely 

 11 or 14), equally distant from anterior or posterior border of the eye 

 and caudal, its upper edge straight or more or less convex in adult, 

 straight or slightly concave in young ; except in very young specimens, 

 longest rays more or less exceeding length of head. Anal III 5, 

 reaching root of caudal, or beyond. Pectoral nearly as long as or a 

 little longer than head, not reaching ventral, the first ray of which falls 

 below 4th or 5th branched ray of dorsal. Caudal deeply emarginate, 

 crescentic when fully spread out. Caudal peduncle as long as deep or 

 a little deeper than long. Scales 36-40 gi gj, 4-5J between lateral line 

 and root of ventral, lG-18 round caudal peduncle. Brown or brownish 

 olive above, the scales often darker at the base, with or without a very 

 indistinct darker lateral band ; young often with dark longitudinal lines 

 running between the scries of scales, and constantly with a large round 

 dark blotch on the caudal peduncle. 



Total length 430 millim. 



Lower Nile to Victoria Nile ; Senegal to Old Calabar ; Kiugnni K. (?). — 

 Types in Senckenberg Museum, Frankfort (M.)- 



1. Ono o£ the types. Cairo. Dr. Riippell (C). 



2, Hgr. Bcni Souef, Lower Nile. L. Loat, Esq. (C). 

 15. Yii. Near Luxor. „ 



4-5. Yg. Assuan. „ 



G. Ad. Abu Hoor, Upper Nile. „ 



7-13. Ad., hgr., & yg. Near Koshch, „ „ 



li. bkel. n n )» 



15. Ad. Hannek, Third Cataract. „ 



16-23. Il^r. & yg. Khartum. J. retlierick, Esq. ((\). 



24. Ilgr. Sennar, Blue Nile. L. Loat, Esq. (C'.j. 



25. Yg. Mouth of Lake No, White „ 



Nile. 



26. Ilgr. Gondokoro, Balir-el-Gebel. J. Petlierick, E.sq. (C). 



27. Y<r. „ „ L. Loat, Es,,. (C!.). 



