37G CICHLID^. 



entirely naked. Gill-rakers short, 9 or 10 on lower part of anterior 

 arch. Dorsal XVIII-XIX 8 ; spines increasing iti length to the last, 

 which measures ^ length of head; longest soft ray at least f length of 

 head. Anal 111 7 ; third spine stronger and longer than last dorsal. 

 Pectoral f length of head. Ventral not reaching vent. Caudal rounded, 

 subacuminate. Caudal peduncle a little deeper than long. Scales 28-29 

 in longitudinal series, 18-19 in transverse series ; lateral lines -^jf . 

 Pale olive-brown above, white beneath ; sometimes a large purple spot 

 on each side of the body ; soft dorsal, anal, and caudal fins usually with 

 transverse series of small brown spots ; dorsal and anal edged with 

 blackish. 



Total length 6G millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 

 1. One of the types. Dolo, Stanley Pool. M. P. Delhez (C). 



2. NANNOCHROMIS DIMIDIATUS. 



Pelmatochromis dimldiatus, Pellegr. Bull. Mus. Paris, 1900, p. 99. 

 Kanochromis dimidiaivs, part., Pellegr. Mem. Soc. Zool. France, xvi. 1901, p. 274, 

 pi. iv. fig. 2. 



Depth of body nearly equal to length of head, 3 to 3^ times in total 



length. Upper profile of head slightly rounded ; snout shorter than eye, 



which is about 3 times in length of head ; mouth extending to below 



anterior border of eye ; 4 or 5 series of teeth in upper jaw ; cheek naked 



or with one or two scales below the eye. 8 gill-rakers on lower part 



of anterior arch. Dorsal XVII 8 ; spines subequal from the third. 



Anal III 6. Pectoral | length of head. Ventral produced into a more 



or less filiform ray. Caudal rounded. Caudal peduncle as long as deep. 



Scales 25 in longitudinal series, 13 in transverse series ; lateral lines -^. 



Pale brown ; a dark lateral band from behind the eye to the 



caudal; soft parts of vertical fins with series of dark dots between 



the rays. 



Total length 62 millim. 



Banghi, Ubanghi. — Types in Paris Museum. 



3. NANNOCHROMIS SQUAMIOEPS. 



Pseudopleslops sqitamiceps, Bouleng. Proc. Zool. Soc. 1902, i. p. 270, pi. xxx. 



fig.l. 

 Xiinoclnomh dimidiafus, pnrt./Pellcgr. Mem. Soc. Zool. France, xvi. 1904, p. 274. 



