CHILOGLANIS. 387 



than its distance from the rayed dorsal. Anal fin with 10 or 11 rays, 7 or 8 of which 

 are branched. Pectoral spine not serrated, about three-fifths the length of the head. 

 Ventral fin midway between the eye or the root of the pectoral fin and the root of the 

 caudal, extending to the origin of the anal or a little beyond. Caudal fin deeply 

 forked, the lobes pointed. Caudal peduncle about twice as long as deep. 



Body pale greyish olive above, with four broad cross-bands of dark olive speckled 

 with blackish, broader than the interspaces between them ; head dark olive above ; 

 lower parts white or yellowish; rayed fins greyish, the caudal with a horizontal 

 blackish bar on each lobe, the end of which is pale yellow (according to sketches made 

 by Mr. Loat) ; adipose fin yellowish; iris yellowish or greyish. 



Measurements (in milimetres). 



Total length 45 



„ ,, (without caudal) 41 



Greatest depth 10 



Length o£ head 12 



Width of head 10 



Length of snout 6 



Diameter of eye 2 



Interorbital width 3 



Width of mouth 4 



Length of dorsal spiue 5 



Basal length of dorsal fin 5 



„ „ adipose fin 9 



Length of pectoral spine 7 



Thirteen specimens were obtained by Mr. Loat in the Nile, at the island of Arko, 

 Soudan, on April 29th and May 5th, 1900. A single specimen had been previously 

 obtained at Wady Haifa, February 22nd, 1900. 



Some of the Arko specimens were distended with ripe eggs of remarkably large size, 

 measuring nearly 2 millimetres in diameter. 



By having 6 or 7 branched rays in the dorsal fin C. niloticus is easily distinguished 

 from its congeners. 



OD^ 



