186 CYPKINIDiE. 



differs from the two preceding species in the more anterior position of the eyes, which 



are larger, the longer barbels, and the shorter caudal peduncle ; from I), blanfordii in 

 the larger eyes. 



Measurements (in millimetres). 



Total length (without caudal) 38 



Greatest depth o£ body 7 



Length of head 9 



Width of head 5^ 



Length of snout 3 



Diameter of eye 2|- 



Interorbital width 4 



Width of mouth 3 



Longest ray of dorsal 9 



„ „ anal 6 



Length of pectoral 8J 



4. DISCOGNATHUS QUADRTMACULATTJS. 

 (Plate XXXI. fig. 5.) 



Gobio quadrimaculatus, Ruppell, Mus. Senckenb. ii. p. 22, pi. iii. fig. 3 (1837). 



? Gobio hirticeps, Biippell, t. c. p. 23, pi. iii. fig. 4. 



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



Discognathus quadrimaculatus , Heckel, 1. c. ; Boulenger, Proc. Zool. Soc. 1903, ii. p. 330. 



Barbus quadrimaculatus, Giinther, Cat. Fish. vii. p. 98 (1868). 



Discognathus chiarinii, Vinciguerra, Ann. Mus. Genova, xviii. 1883, p. 696, Hg., and xxix. 1898_, 



p. 259. 

 Crossochilus quadrimaculatus, Boulenger, Ann. & Mag. N. H. (7) x. 1902, p. 422. 



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

 head, which is contained four to five times in the total length. Head slightly depressed, 

 once and one-third to once and three-fifths as long as broad, with rounded snout and 

 nearly flat interorbital region ; eye supero-lateral, in the middle of the length of the 

 head, its diameter four (young) to six times in the length of the head, once and three- 

 fifths to twice and a half in the interorbital width ; width of the mouth nearly half the 

 length of the head ; upper lip well developed, bordered by papilla? forming a fringe ; 

 lower lip usually confined to the sides, the mental disk merely indicated by a swelling 

 of the integument ; this disk, which may be very indistinct, not broader than long ; 

 without or with a very feeble free border ; two barbels on each side, measuring one- 

 half to four-fifths the diameter of the eye. Dorsal fin with 9 or 10 rays, 7 of which are 

 branched, equally distant from the centre or the posterior border of the eye and from 



