DISCOGNATHUS. 



351 



a more or less distinct yellowish, dark-edged bar at the root of the 

 caudal fin. 



Total length 70 millim. 



Nyiro River (Lorian Swamp), Kenya District, East Africa. 

 1-20. Types. Nyiro R., 7000 ft. S. L. Hindc, Esq. (P.). 



7. DISCOGNATHUS QUADRlMACmLATUS. 

 Gohio quadrimaculatus, Riipp. Mus. Seckenb. ii. p. 22, pi. iii. fig. 3 (1837). 

 ? Gobio hlrticeps, Riipp. t. c. p. 23, pi. iii. fig. -i. 



? Discognathus hirticeps, Heckel, Riissegger's Reise Egypt, iii. p. 329 (1846). 

 Discognatlms quadrimaculatus, Heckel, 1. c. ; Bouleng. Proc. Zool. Soc. 1903, ii. 



p. 330, and Fish. Nile, p. 186, pi. xxxi. fig. 5 a907). 

 Barhus quadrimaculatus, Giintli. Cat. Fish. vii. p. 98 (1868). 

 Discognathus cJiiarinii, Vincig. Ann. Mus. Geneva, xviii. 1883, p. 696, fig., and 



xxix. 1898, p. 259. 

 Crossochihis quadrimaculatus, Bouleng. Ann. & Mag. N. H. (7) x. 1902, p. 422. 



Body feebly compressed, its depth equal to or a little less than length 

 of head, which is contained 4 to 5 times in total length. Head slightly 

 depressed, 1^ to If times as long as broad, with rounded snout and 

 nearly flat interorbital region ; eye superolateral, in middle of length of 

 head, its diameter 4 (young) to 6 times in length of head, If to 2 J times 



Fig. 265. 





Discognathus quadrimaculatus. 

 Lake Tsana (F. N.). f 



in interorbital width ; width of mouth nearly J length of head; upper 

 lip well developed, bordered by papillee forming a fringe; lower lip 

 usuaRy confined to the sides, the mental disk merely indicated by a 

 sweRing of the integument; this disk, which may be very indistinct, not 

 broader than long, without or with a very feeble free border; 2 barbels 

 on each side, measuring ^ to f diameter of eye. Dorsal II-III 7, 

 equally distant from centre or posterior border of eye and from caudal ; 

 longest ray a little shorter than head. Anal II 5. Pectoral as long as 



