| OCR Text |
Show 236 ON THE ICHTHYOLOGY OF THE CONGO. [Mar. 18, scales less both above and below the lateral line. The numbers scales are as follows in the six Congo species with notched dorsal fin with 10 or 11 branched rays, supero-lateral eyes, and a single barbel on each side :- L.falcifer Blgr.-Sq. 39 g,, 5 between L. 1. and V., 20 round caud. ped. L. macrostomus Blgr.-Sq. 38-39 ^ 4 between L. 1. and V., 16-18 round caud. ped. L. greenii Blgr.-Sq. 37-38 |, 4 between L. 1. and V., 16 round caud. ped. L. nasus Blgr.-Sq. 38-39 £, 4 between L. 1. and V., 16 round caud. ped. L. luktdce Blgr.-Sq. 35 |, 4 between L. 1. and V., 12 round caud. ped. L. parvus Blgr.-Sq. 33-35 g^, 3 between L. 1. and V., 12 round caud. ped. CHILOCHROMIS, g. n. Body moderately elongate ; scales cycloid. Jaws with very broad bands of bristle-like movable teeth with club-shaped inbent crowns; rami of lower jaw approximated, spatulate in front, connected with the upper jaw by a broad, thin lip; maxillary concealed under the praeorbital. Dorsal with 17 spines, anal with 3. This remarkable new genus approaches Petrochromis Blgr., but differs from it in the narrower lower jaw and in the teeth being simply club-shaped, instead of bi- or tricuspid. I have much pleasure in naming the species in honour of the eminent Director of the Brussels Museum, one of the pioneers in the geological exploration of the Congo Basin. CHILOCHROMIS DUPONTI, sp. n. (Plate XXIV.) Depth of body 2| times in total length, length of head 3| times. Snout rounded, with arched profile, a little longer than the diameter of the eye, which is contained 3£ times in the length of the head and 1^ in the interorbital width; mouth extending to below7 the nostril; teeth very numerous, with reddish-brown crowns, those of the upper jaw in 8 or 9 transverse series, those of the lower jaw forming two spoon-shaped groups; the inner teeth smaller than the outer ; 3 or 4 series of scales on the cheek; large scales on the opercle. Gill-rakers short and slender, 15 on lower part of anterior arch. Dorsal XVII 10 ; last spine longest, \ length of head ; middle soft rays longer than the head. Pectoral acutely pointed, as long as the head. Ventral not reaching the vent. Anal III 8; third spine longest, a little shorter than longest dorsal; middle soft rays | length of head. Caudal fin feebly emarginate. Caudal peduncle as long as deep. Scales 33 j* ; lat. 1. |j. Uniform olive-brown above, yellowish beneath ; fins greyish. |
