. Bulletin of the British Museum (Natural History). A REVISION OF CERTAIN BARBUS SPECIES FROM AFRICA 177 Depth of body 26-6-33-4 (M = 29-9), length of head 24-2-28-2, M = 26-4 (R. 23-I-23-4). Snout length 7-I-9-3 (M = 8-i), (R. 5-4-6-3) ; eye diameter (nega- tively allometric) 6-3-8-5 ; least interorbital width 9-4-II-4 (M = 10-3), (R. 7-8-8-2). Length of anterior barbel 4-5-8-4 [M = 5-8), (G. 7-3-87, M = 8-3) length of posterior barbel 5-8-IO-4 (M = 7-4), (G. 8-g-io-9, M = 9-8 ; R. 5-4-5-5) ; length of anterior barbel relative to eye diameter : equal to ; longer, ; shorter than (
. Bulletin of the British Museum (Natural History). A REVISION OF CERTAIN BARBUS SPECIES FROM AFRICA 177 Depth of body 26-6-33-4 (M = 29-9), length of head 24-2-28-2, M = 26-4 (R. 23-I-23-4). Snout length 7-I-9-3 (M = 8-i), (R. 5-4-6-3) ; eye diameter (nega- tively allometric) 6-3-8-5 ; least interorbital width 9-4-II-4 (M = 10-3), (R. 7-8-8-2). Length of anterior barbel 4-5-8-4 [M = 5-8), (G. 7-3-87, M = 8-3) length of posterior barbel 5-8-IO-4 (M = 7-4), (G. 8-g-io-9, M = 9-8 ; R. 5-4-5-5) ; length of anterior barbel relative to eye diameter : equal to ; longer, ; shorter than (G. equal to ; longer than ; shorter than ; the anterior barbel is shorter than the eye in the three Ruanda specimens examined). Length of last unbranched dorsal ray i^-y-24-3 (M = 20-2) ; distance from snout tip to dorsal origin 46-0-56-0 {M = 517) ; length of pectoral fin i6-8-23-o. Caudal peduncle length 20-3-25-4 (M = 227), its depth I2-5-I5-5 (M = 13-8).. Fig. 7. Barbiis euiaenia paratype, slightly less than (after Boulenger, Cat. Afr. Fish.) Lateral line with 25 () ; 26 () or 27 () scales (two damaged specimens give counts of ca. 23 and 24) ; 4I or 5 scales (rarely 4 or 5I) between the dorsal fin origin and the lateral line, 2| or 3 (rarely 3^) between the lateral line and the pelvic fin insertion. Twelve to fourteen scales around the caudal peduncle (10 or 11 in the Ruanda specimens) ; g-ii (mode 10) in the predorsal row. Dorsal fin origin behind or above the posterior pelvic rays, the fin with 3/7 rays (except Garizi fishes which have 3/8 or 3/9). Last unbranched dorsal ray moderately stout, serrated on its posterior face. Anal fin with 3/5 rays in all populations. Coloration. In alcohol-fixed specimens the ground colour is brown above and yeUowish-brown with sometimes a silver sheen on the flanks. In darkly coloured fishes the pigment is concentrated near the centre of the scales. A distinct and gener- ally broad midlateral band extends fr
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