BAKILIUS. 267 



In spirit, the fish is silvery white, brown or steel-blue on the back, with ten to 

 sixteen more or less distinct bluish-black vertical bars on each side of the body above 

 the lateral line. 



The following description of the colour was drawn up by Mr. Loat from fresh specimens 

 at Derr and at Gondokoro : — " The whole fish silvery, the upper surface dark sage- 

 green, slightly tinged with brown, the lower surface white ; the vertical lateral bars 

 dull blue ; fins white, tinged with pink or orange or pale buff; fine black lines along 

 the rays of the dorsal and of the caudal ; the latter fin edged with black and with some 

 reddish orange in the middle of each lobe ; a ring of orange colour round the pupil." 



This handsome fish, which reaches a length of 185 millimetres, was discovered at 

 Derr by Mr. Loat in January 1900. Fourteen specimens were caught soon after, in 

 February and September-October, at Derr and Assuan, and, on February 5th, at night, 

 in a small, shallow backwater of the Nile at Ibrim, near Wady Haifa, but the species 

 appears to be uncommon in that part of the Nile. Large numbers, on the other hand, 

 were obtained at Gondokoro in February and March 1902. 



The species has also been found in the Blue Nile by Capt. S. Flower, and in the 

 Omo Kiver by Mr. O. Neumann and by Mr. Zaphiro. 



List of specimens examined : — 



5 Nile between Luxor and Assuan. — Loat, 9-10.00. 



1 Nile at Assuan.— Loat, 26.9.00. 



3 Derr, Nubia.— Loat, 31.1.00, 3.2.00. (Types.) 



5 Ibrim, Nubia.— Loat, 5.2.00. (Types.) 



1 Wad Medine, Blue Nile.— Capt. Flower, 6.05. 



47 Gondokoro.— Loat, 16.2.02-19.3.02. 



1 Zendo R., affluent of the Maze R. (Omo), 4300 feet.— Zaphiro, 10.7.05. 



1 Omo R.j between Malo and Koscha. — O. Neumann, 20.2.01. 



Having counted the fin-rays and scales in sixty specimens, I find 7 branched rays in 

 the dorsal eight times, 8 forty-eight times, and 9 four times ; 12 branched rays in the 

 anal four times, 13 seventeen times, 14 twenty-four times, and 6 fifteen times ; 51 scales 

 in the lateral line once, 52 six times, 53 six times, 54 six times, 55 sixteen times, 

 56 twelve times, 57 nine times, and 58 four times. 



Called " mergan " (J^<«) at Assuan. 



The Barilius which has been named after Mr. Leonard Loat, in recognition of his 

 valuable services to Ichthyology, is very nearly related to B. senegalensis, Steindachner 

 (Sitzb. Ak. Wien, lxi. i. 1870, p. 564, pi. v. fig. 2), from the Senegal, which appears to 

 differ only in the higher number of scales in the lateral line, viz. 59 to 63. 



2m 2 



