376 CICHLID^:. 



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

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

 which measures -| length of head ; longest soft ray at least § length of 

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

 Pectoral § 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 ~±jj-. 

 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 66 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 

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



2. NANNOCHROMIS DIMIDIATUS. 



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

 Nanochromis dimidiatus, part., Pellegr. Mem. Soc. Zool. France, xvi. 1904, 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. 



IS 



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

 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 SQUAMICEPS. 



Pseudople slops squamiceps, Bouleng. Proc. Zool. Soc. 1902, i. p. 270, pi. xxx. 



fig.l. 

 Nanochromis dimidiatus, part., Pellegr. Mem. Soc. Zool. France, xvi. 1904. p. 274. 



