378 



SlLUEID^i. 



dorsal fin three to four and a half times as long as deep, four to eight times as long as 

 its distance from the rayed dorsal. Anal fin acutely pointed, with 12 to 14 rays, 7 to 9 

 of which are branched. Pectoral spine shorter than that of the dorsal, sometimes 

 reaching the base of the ventral fin, its outer border feebly serrated, its inner border 

 with 10 (young) to 25 strong serrae. Ventral fin acutely pointed, reaching the origin 

 of the anal fin or a little beyond. Caudal fin deeply forked, the upper lobe the longer. 

 Caudal peduncle as long as deep or a little deeper than long. 



According to Redoute and Rifaud, mentioned by Valenciennes, the upper parts, in 

 fresh specimens, are dark grey or blackish green above, whitish beneath. A sketch 

 made by Mr. Loat at Wad Medine indicates the upper parts as silvery grey, the lower 

 white ; other specimens are stated to be dark grey above, with bronzy green reflection ; 



Measurements (in millimetres). 





1. 



2. 



3. 



4. 



5. 



G. 



7. 



8. 



9. 



Total length (without caudal) .... 



245 



220 



205 



190 



180 



160 



120 



95 



67 



Greatest depth 



87 

 73 

 51 

 29 

 12 

 31 

 14 

 49 



83 

 66 

 45 

 26 

 14 

 30 

 13 

 46 



62 

 66 

 46 

 35 



12 



25 

 12 

 46 



63 

 55 



39 

 27 

 10 

 2d 

 11 

 39 



64 

 53 

 36 

 24 

 11 

 24 

 11 

 50 



50 

 48 

 29 

 23 



9 

 22 



9 

 30 



39 

 39 

 24 



18 

 8 



17 

 8 



26 



30 

 32 

 19 

 13 



6 

 13 



6 

 23 



21 



Length of head 



23 



"Width of head 



14 



Length of snout . . . 



10 



Diameter of eye 



5 



Interorbital width 



9 



Width of mouth 



5 



Maxillary barbel 



14 



Outer mandibular barbel 



23 



22 



27 



17 



21 



18 



13 



12 



7 



Inner mandibular barbel 



17 



16 



14 



13 



13 



11 



9 



9 



5 



Length of dorsal spine 



93 



78 



64 



75 



70 



60 



45 



35 



25 



Basal length of dorsal fin ....... . 



44 



37 



27 



32 



30 



2d 



19 



16 



10 



,, „ adipose fin 



96 



77 



60 



57 



62 



50 



37 



30 



20 



Greatest depth of adipose fin .... 



2d 



20 



14 



17 



19 



15 



11 



10 



5 



Length of pectoral spine 



6d 



58 



57 



51 



50 



43 



30 



24 



16 



1. Wad Medine.— Loat. 1 



2. L. No.— -Loat. 



3, 5. 



4. L. 



Gambia 

 Chad.- 



.— Bud< 

 -Goslin 



jett. 



or. 



3 



1 e 



7 



. Cair 

 -9. A\ 



o. — Eiif 

 'hite JN T i 



>pell. 

 le.— Za 



miro. 



