PETROCIIEOMIS, 



271 



extending to between nostril and eye, upper lip very thick; 4 to 6 

 series of scales on the cheek. Gill-rakers very short, 10 to 13 on lower 

 part of anterior arch. Dorsal XVII-XIX 8-10 ; spines increasing in 

 length to the sixth or eighth, which measures about f length of head ; 

 longest soft rays | to § length of head. Anal III 7-8 ; third spine as 

 long as and stronger than longest dorsal. Pectoral as long as or a little 

 shorter than head, reaching origin of anal or not quite so far. Ventral 



Fig. 184. 



.' ' v'^^->'*^'>P;;|?t ''^^4^^'''^^\ 



^^, ^y M 



I'ttrochfoniis pohjodon. 

 Type (Tr. Z. S. 1898). 



reachino- vent or anal. Caudal truncate. Caudal peduncle as long as 



2'2-24 



deep. Scales feebly denticulate, 32-34 jgriB = ^^^^^'^^ lines jgij;- 

 Olive-brown above, lighter beneath, fins grey or blackish ; anal some- 

 times with several bright yellow spots. 



Total length 200 millim. 



Lake Tanganyika. 



1. Type. 



2. Type. 

 3-4. Ad. 

 .5. H-r. 

 C. Ad. 



7. Ad. 



8. Skel. 



Kinyamkolo. 



Mbity Rocks. 



Niamkolo. 



Pembe. 



Moliro. 



Tumpa. 



L. Tanganyika. 



Prof. J. E. S. Moore (C). 

 Dr. AV. A. Cunnington (C). 

 Dr. L. Stappers (().). 

 Prof. J. E. y. Moore (0,). 



