236 ON THE ICHTHYOLOGY OP THE CONGO. [Mar. 18, 



scales less both above and below the lateral line. The numbers of 

 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^j^, 5 between L. 1. and Y., 20 round 



caud. ped. 

 L. macrostomus Blgr. — Sq. 38-39 ^, 4 between L. 1. and Y., 



16-18 round caud. ped. 

 L, greenii Blgr. — Sq. 37-38 ^, 4 between L. 1. and Y., 16 round 



caud. ped, 

 L. nasus Blgr. — Sq. 38-39 y, 4 between L. 1. and Y., 16 round 



caud. ped. 

 L. lukulce Blgr. — Sq. 35 „, 4 between L. 1, and Y., 12 round 



caud. ped. 

 L. 2)arvus lB\gr. — Sq. 33-35 g^^, 3 between L. 1. and Y., 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 Brvissels Musevim, one of the pioneers in the geological 

 exploration of the Congo Basin. 



Chilochromis DUPONTi, sp. n. (Plate XXIY.) 



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 

 below the nostril ; teeth very numerovis, 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 antei-ior arch. Dorsal XYII 10 ; last spine longest, 

 |- length of head ; middle soft rays longer than the head. Pec- 

 toral acutely pointed, as long as the head. Yentral 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. 



