CICHLID FISHES OF LAKE NYASSA. 727 



AULO^S-QCARA NYASS^, Sp. n. (PI. Y. fig. 1.) 



Depth of body 2^ to 3 in length, length of head 2| to 3. 

 Snout with straight or slightly convex profile, as long as post- 

 orbital part of head. Diameter of eye 34- to 3| in length of head, 

 equal to or greater than prEeorbital depth, greater than inter- 

 orbital width. Jaws equal anteriorly; maxillary concealed, not 

 extending to below eye ; teeth small and slender, in 4 or 5 series, 

 outer bicuspid, scarcely larger than inner. 9 or 10 gill-rakers on 

 lower part of anterior ai'ch. Pharyngeal teeth small, slender, 

 bicuspid. 31 or 32 scales in a longitudinal series, 5 or 6 from 

 origin of dorsal to lateral line. Dorsal XV--XVI 10-11 ; last 

 spine f to I length of head. Anal III 9 ; third spine stronger 

 and as long as or a little shorter than last dorsal. Pectoral as 

 long as head, reaching anal. Caudal scaly, emarginate. Caudal 

 peduncle longer than deep. Silvery ; an opercular spot ; about 

 10 faint dark cross-bars ; dorsal with series of oi-ange spots ; 

 lower fins orange ( $ ) or blackish, the anal with orange 

 spots (J). 



Three specimens, 100-125 mm. long (Wood). 



EXPLANATION OF THE PLATES. 



Plate I. Haplochromis pohjstigma. 

 Plate II. ,, woodi. 



Plate III. „ praorhitalis. 



Plate IV. fig. 1. „ eucinostomus. 



fig. 2. ,. macrostoma. 



Plate Y. fig. 1. Aulonocara nyassce. 



fig. 2. Hapliichromis longipes. 



Plate VI. fig. 1. JRliamphocliromis macroplitlialmus. 



fig. 2. Ilaplocliromis spilorhynchus. 



Proc. Zool. See— 1921, No. XLIX. 49 



