362 



SILURID^. 



their filaments, which are whitish ; caudal fin greyish white, with a deep black band 

 along each lobe ; barbels white ; iris bronzy. 

 Total length 240 millimetres. 



Measurements (in millimetres). 



Total length (without caudal) 



Greatest depth 



Length of head 



Width of head 



Length of snout 



Diameter of eye 



Interorbital width 



Width of mouth 



Maxillary barbel 



Outer mandibular barbel 

 Inner mandibular barbel 



Length of dorsal spine 



Basal length of dorsal fin ... . 



„ „ adipose fin . . 



Greatest depth of adipose fin 



Length of pectoral spine . . . . 



1. 



2. 



3. 



4. 



220 



185 



170 



137 



65 



62 



56 



41 



62 



55 



51 



39 



51 



46 



41 



31 



28 



23 



20 



17 



12 



11 



10 



9 



29 



25 



22 



18 



18 



15 



14 



13 



80 



68 



65 



59 



45 



45 



42 



39 



21 



18 



21 



17 



65 



47 



44 



37 



33 



29 



27 



20 



80 



70 



62 



47 



20 



22 



20 



14 



62 



47 



43 



38 



i. No. 



1 



4. Nur ed 



Daim. 



1. Kawa. 



2, 3. Mouth of L. No, 



This species is known only from the White Nile, where it was discovered by 

 Mr. Loat. Three specimens were obtained at the mouth of Lake No (30.1 — 1-3.2.01), 

 two at Kawa (5.1.01), and one at Nur ed Daim (6.1.01). According to Mr. Loat it 

 occurs also at Omdurman, where it is called " Gargom trakey " or " Trakey " (^J j&)- 



