Vol. 5, p. 187-188, pi. 8-10. December 18, 1925. 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



THREE NEW CICHLID FISHES OF THE GENUS HAPLOCHROMIS 

 FROM LAKE EDWARD, CENTRAL AFRICA. 



BY C. TATE REGAN, F.R.S. 



The Cichlid Fishes collected by Dr. John C. PhilHps in 1924 

 include three young examples of Tilapia nilotica from Lake 

 Chankaranga, central Ankole, Uganda, and a series of about 20 

 Haplochromis schubotzi from Lake Edward, among them a uniform- 

 ly blackish male of 115 mm. and another male of 85 mm. with 

 well-defined crossbars. There are also examples of three species 

 of Haplochromis which appear to be new to science. 



Haplochromis serridens, sp. nov. 

 Plate 8. 



Type. — No. 31522, Museum of Comparative Zoology, from Lake Edward; 

 80 mm. in length to base of caudal. 



Description. — Depth of body 2^/z in length, length of head 3. Snout de- 

 curved, a little shorter than diameter of eye, which is 3 V4 in length of head, 

 equal to interorbital width, twice preorbital depth, greater than depth of cheek. 

 Jaws equal anteriorly; maxillary extending to below anterior edge of eye; 

 about 50 bicuspid teeth in outer series of upper jaw, followed by 5 (in the 

 smaller specimen) or 7 series of minute tricuspid teeth with equal cusps. 

 Scales on cheek in 3 series. Gill-rakers, 9 or 10 on lower part of anterior arch. 

 Pharyngeal teeth small. Scales in a longitudinal series, 31; from origin of 

 dorsal to lateral line, 6; between pectoral and pelvic fins, 6. Dorsal XV, 9; 

 last spine ^/g to nearly V2 length of head. Anal III, 9; third spine a little 

 shorter than last dorsal. Pectoral as long as or a little shorter than head, 

 reaching anal. Caudal peduncle longer than deep. Silvery; back darker; an 

 opercular spot; a more or less distinct spot at base of each scale on back and 

 sides; fins pale. 



Remarks. — Two specimens, 80 and 85 mm. in length to base of 

 caudal fin (which is incomplete in both). The smaller has 

 several large eggs in the mouth. 



Haplochromis fuscus, sp. nov. 

 Plate 9. 



Type.^-'No. 31524, Museum of Comparative Zoology, from Lake Edward; 

 92 mm. in total length. 



Description. — Depth of body 2^/5 to 3 in length, length of head 3 to 3V3- 

 Snout with straight profile, as long as or longer than diameter of eye, which is 

 3 ^/2 to 4 in length of head, greater than preorbital depth, and about equal ta 

 depth of cheek; interorbital width 4 in length of head. Mouth little obhque; 

 jaws equal anteriorly; maxillary extending to below anterior V4 of eye; 40 to 60 

 teeth in outer series of upper jaw, all but the last 2 or 3 on each side bicuspid, 

 followed by 4 or 5 series of minute tricuspid teeth. Scales on cheek in 3 

 series. Gill-rakers, 8 on lower part of anterior arch. Pharyngeal teeth small. 

 Scales in a longitudinal series, 31 or 32; from origin of dorsal to lateral line, 

 6 or 7; between pectoral and pelvic fins, 8. Dorsal XV to XVI, 8 to 9; last 



DEC 2!) ^?Sy 



