Fishes from Lake Nyassa. 241 



head 3 times. Head strongly compressed ; eye 7 to 8 times 

 in length of head, 3^ to 4 times in length of snout ; maxillary 

 widely separated from vertical of anterior border of eye ; chin 

 projecting ; teeth in two series, few, outer large and widely 

 spaced ; 5 or 6 series of scales on the cheek ; 15 or 16 gill- 

 rakers on lower part of anterior arch. Dorsal spines weak, 

 increasing in length to the last, which measures ^ length of 

 head. Pectoral ^ length of head. Caudal fin distinctly 

 emarginate, greater part scaled. Caudal peduncle 2 to 1\ 

 times as long as deep. Scales finely denticulate. Bright 

 silvery white, except on the base, which is dark green; fins 

 bluish grey, dorsal and anal edged with orange. 



Total length 370 mm. Three specimens. 



Allied to P. longiceps, Gthr. 



JLapIochromis venustus. 



19-23 



D. XVI 10-11. A. Ill 10. Sc. 32-35 ~. L. 1. JJg. 



Depth of body 2^ to 2| times in total length, length of 

 head 3 times. Eye 4 to 4^ times in length of head, about 

 twice in length of snout ; maxillary extending to between 

 nostril and eye ; lower jaw not projecting; teeth in 4 to 6 

 series, outer largest, all conical or some of the outer bi- 

 cuspid ; 3 or 4 series of scales on the cheek; 11 or 12 gill- 

 rakers on lower part of anterior arch. Dorsal spines in- 

 creasing in length to the last, which measures ^ or a little 

 less than \ length of head. Soft dorsal, anal, and ventrals 

 prolonged, acutely pointed. Pectoral as long as head. 

 Caudal fin truncate or slightly emarginate, scaled. Caudal 

 peduncle a little longer than deep. Scales finely denticulate. 

 Peacock-blue, with large deep-blue spots, dotted with red ; 

 top of head and a broad edge to the fius orange. 



Total length 195 mm. Five specimens. 



Closely allied to H. livinqstonii (Hemichromis livingstonii, 

 Gthr.). " 



Tilapia auromarginata. 

 L. 



D. XVII-XVIII 11. A. Ill 10. Sc. 33-35 ^. 



18-24 

 15-17* 



Depth of body 2^ times in total length, length of head 3^ 

 to 3^ times. Eye 3^ to 4 times in length of head, 1^ to 1^ 

 times in length of snout ; maxillary extending to between 

 nostril and eye; lower jaw not projecting; teeth small, in 4 



Ann. & May. N. Hist. Ser. 8. Vol. ii. 17 



