CICHLID FISHES OF LAKE NYASSA. 



711 



37. Haplochromis atrit^eniatus, sp. n. (Text-fig. 23.) 



Depth of body 2| in length, length of head 3. Snont with 

 straight profile, nearly as long as postorbital part of head. 

 Diameter of eye 4 to 41- in length of head, intei'orbital width 4, 

 depth of prseorbital 4 to 4|^. Lower jtiw slightly projecting ; 

 maxillary not quite reaching vertical from antei'ior edge of eye; 

 teeth in 3 series^ outer bicuspid or some conical, 70 in outer series 

 of upper jaw. 4 series of scales on cheek. 11 gill-rakers on lower 

 part of anterior arch. Pharyngeal teeth small. 33 or 34 scales 

 in a longitudinal series, 6 or 7 from origin of dorsal to lateral 

 liire. Dorsal XVI 10-11 ; spines equal or slightly increasing 

 from the sixth, last §■ or a little more than ^ leno'th of head. 



SapJochromis atrita-niafus. i. 



Anal III 9 ; third spine ^ head. Pectoral as long as head, 

 extending a little beyond origin of anal. Caudal emarginate. 

 Caudal peduncle l^j to 1|- as long as deep. An opercular spot; 

 a blackish band from nape to c-.iudal ; dorsal and caudal with 

 series of spots. 



Two specimens, 150 and 170 mm. long [Wood). 



38. Haplochromis spiloehynchus, sp. n. (PL VI. fig. 2.) 



Paratilapia dimidiata (part.) Bouleng. Cat. Afr. Fish. iii. p. 360. 



Depth of body 3^ to 3f in length, length of head about 3. 

 Snout decurved, as long as postorbital pai-t of head. Diameter of 

 eye 4| to 5| in length of head, less than depth of prseorbital or 

 cheek; interorbital width 4| to 5g in length of head. Lower jaw 

 a little projecting : maxillary not extending to below eye ; teett 

 conical, in 3 or 4 series, outer strong and spaced, 25 to 40 in 

 upper jaw. 5 or 6 series of scales on cheek. 10 or 11 gill- 



Proc. Zool. Soc— 1921 No. XLVIII. 48 



