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Show 1902.] FISHES FROM THE GOLD COAST. 333 cheek. Form of the body rather oblong, its depth being contained 23 or 21 in its length (without caudal), and more than the length of the head. Gill-rakers of the outer arch twelve (4 + 8). Pectoral fin as long as, or even slightly longer than, the head, extending to the vent or origin of the anal. Ventral produced into a filament which may reach beyond the origin of the anal. The eighth dorsal spine is contained 2| or 2g in the length of the head. Caudal fin truncate, with the corners pointed. Scales cycloid. Colour variable : the whole fish may be brownish-black, the vertical and ventral fins and the base of each scale being deep black; or it may be of a uniform light colour, with some irregular black blotches on the opercle and throat. Three specimens from Lake Busum-clii, measuring from 100 to 125 millim. C hromis b u sum a n u s , sp. n. (Plate XXX.) X). is.. A. |. P. 13. L. lat. 29-30. L. transv. 3/11. Scales cycloid, those on the cheek in three (two ') series. Teeth small, a few notched, in several series, from 24 to 28 on each side of the upper jaw; those of the lower jaw minute. Mouth rather small, the maxillary scarcely reaching the vertical from the anterior border of the eye. The depth of the body is two fifths of the total length (without caudal), the length of the head one third. Eye one fourth of the length of the head, two thirds of that of the snout, and rather less than the width of the interorbital space. Nape of the neck more or less elevated, rendering the upper jjrofile of the head slightly concave. Pectoral fin as long as the head, extending nearly to, and sometimes even to, the origin of the anal. Caudal fin truncate or scarcely emarginate, with the corners rounded, or with the upper angular and the lower rounded, scaly at the base. The spinous dorsal fin rather low, the length of the eighth spine being about one third of that of the head. Gill-rakers of the outer branchial arch from 15 to 17 on the whole arch, or from 11 to 12 on its lower portion. Coloration uniform, or with six very indistinct cross-bands; operculum and dorsal fin with the usual black spot. Total length 135 millim. Several specimens from Lake Busum-chi. C hr om is m u l t if a s c ia t u s , sp. n. (Plate XXXI.) Allied to C. macrocephalus Bleek. D. i i A. §. P. 13. L. lat. 28. L. transv. 3/11. Scales cycloid, those on the cheek in two series. Teeth very small in several series, notched, about 36 or 34 on one side of the upper jaw2; those of the lower jaw minute. Mouth small, transverse, the maxillary terminating at some distance in advance 1 Three series in three species, in two others the third series is reduced to a single S°21 Young specimens of about 70 millim. in length have a smaller number, viz. 28 or 30, |
