CICHLID FISHES OF LAKE NYASSA. 695 



12. Haplochromis microstoma, sp. n. (Text-fig. 10.) 



Tilapia kirkii (part.) Pouleng. Cat. Afr. Fish. iii. p. 251. 



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

 straight, as long as or longer than diameter of eye, which is 3^ 

 to 4 in length of head, a little or considerably greater than prse- 

 orbital depth ; interorbital width 4 in length of head. Mouth 

 small ; jaws equal anteriorly ; maxillary ending a little behind 

 nostril ; teeth in 4 well-sepai^ated series, inner tricuspid, outer 

 bicuspid, 24 to 30 in outer series of upper jaw. 3 or 4 series of 

 scales on cheek. 11 gill-rakers on lower part of anterior arch. 



Text-fiffure 10. 



Saplocliromis microstoma, f. 



Pharyngeal teeth small. 33 or 34 scales in a longitudinal series, 

 5 or 6 from origin of dorsal to lateral line. Dorsal XVII 11 ; 

 last spine f to ;j length of head. Anal III 9 ; third spine a little 

 shorter than last dorsal. Pectoral as long as head, not reaching 

 anal. Caudal deeply emarginate. Caudal peduncle li as long as 

 deep. Silvery ; a dark lateral band from operculum to base of 

 caudal ; two series of small dark spots, one at base of dorsal, the 

 other above lateral line ; dorsal spotted. 



Two specimens, 80 mm. {Wood) and 115 mm. [Ehoades) in 

 length. 



13. HapLOCHROMIS UROTiENIA, sp. n. (Text-fig. 11.) 



Depth of body 2| to 3 in length, length of head 24- to 3. Snout 

 with straight upper profile, in adult as long as postorbital part 

 of head. Diameter of eye 4 to 4| in length of head, equal to 

 or a little less than praeorbital depth, less than depth of cheek; 

 interorbital width 3| to 4 in length of head. Lower jaw a little 

 projecting ; maxillary not quite reaching vertical from anterior 

 edge of eye ; teeth conical in 2 or 3 series, 35 to 45 in outer 



Proc. Zool. Soc— 1921, No. XLYII. 47 



