HAPLOCHEOMIS. 505 



4. HAPLOCHROMIS ALLUAUDI. 

 (Plate XC. fig. 4.) 



Astatoreochromis alkiaudi, Pellegrin, Mem. Soc. Zool. France, xvi. 1904, p. 385, and xvii. 1905, 

 p. 185, pi. xvi. fig. 2. 



Depth of body equal to or a little greater than the length of the head, twice and 

 two-fifths to three times in the total length. Snout with straight or slightly convex 

 profile, as long as the eye in the young, a little longer in the adult ; diameter of the 

 eye three and a half (young) to four and a half times in the length of the head, once 

 (young) to once and a half in the interorbital width, once and one-fourth to once and 

 one-third the least width of the suborbital; jaws equal in front, or lower slightly 

 projecting ; maxillary extending to below the anterior border of the eye or a little 

 beyond; outer teeth rather large, partly conical and partly bicuspid in the adult, 

 bicuspid in the young, 40 to 50 in the upper jaw, followed by one or two series of 

 minute tricuspid teeth ; four or five series of scales on the cheek, the depth of the 

 scaly part below the eye equal to the diameter of the eye ; large scales on the opercle. 

 Gill-rakers very short, 8 or 9 on lower part of anterior arch. Dorsal fin with 18 or 

 19 spines and 7 or 8 soft rays ; spines increasing in length to the last, which measures 

 two-fifths to three-fifths the length of the head; longest soft rays half to three- 

 fourths the length of the head. Anal fin with 4 to 6 spines and 6 to 9 soft rays ; last 

 spine as long as or a little shorter than the last dorsal. Pectoral fin pointed, two- 

 thirds to four-fifths the length of the head, not extending quite to the origin of the 

 anal fin. Ventral fin reaching beyond the origin of the anal. Caudal fin rounded. 

 Caudal peduncle as long as or slightly longer than deep. Scales strongly denticulate, 

 32-34 -j-jpjTj (four to six series between the first dorsal spine and the lateral line); 

 lateral lines joE^. 



Olive or brownish, with or without ill-defined dark cross-bars ; some young specimens 

 dark steel-grey, nearly black on the top of the back and head ; a black or blackish 

 vertical bar below the anterior third of the eye, sometimes another, from behind the 

 eye to the angle of the preeoperculum ; vertical fins dark, with more or less distinct 

 small darker spots; dorsal and anal fins usually edged with blackish ; anal fin, in the 

 males, with two or three series of light, dark-edged ocellar spots. 



Total length 155 millimetres. 



Lake Victoria. The original specimens, one of which is now in the British Museum, 

 were collected in Kavirondo Bay by M. Alluaud in 1904. One specimen was received 

 in the same year from Col. Delme EadclifFe ; seven specimens were brought home 



3t 



