PETROCHKOMIS. 



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 f 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. 



Petroihromis pohjodon. 

 Type (Tr. Z. S. 1898). 



reaching vent or anal 

 deep. 



Caudal truncate. Caudal peduncle as long as 



3-4 . t > ,> _*>4 



Scales feebly denticulate, 32-34 j^riB '■> lateral lines fgrpT 



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

 times with several bright yellow spots. 

 Total length 200 millim. 



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

 Dr. W. A. Cunnington (C). 

 Dr. L. Stappers (C). 

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



Lake Tar 



ganyika. 





1. Type. 





Kinyamkolo. 



2. Type. 





Mbity Rocks. 



3-4. Ad. 





Niamkolo. 



5. Hgr. 





Pembe. 



6. Ad. 





Moliro. 



7. Ad. 





Tumpn. 



8. Skel. 





L. Tanganyika 



