94 MR. G. A. BOULENGER ON A COLLECTION 



sixth or seventh, measuring -J length of head and f longest soft rays. Pectoral obtusely 

 pointed, § length of head, not extending to origin of anal. Ventral reaching vent. 

 Anal III 7 ; third spine a little shorter than longest dorsals. Caudal truncate. 

 Caudal peduncle as long as deep. Scales mostly cycloid, a few on the sides of the 

 body below the lateral line finely denticulate, 32-33 j^^g ' ^^^- ^- 1^3- Olive-brown 

 above, pale yellow beneath ; dark cross-bars on the back;, each scale of the back and 

 sides with a central vermilion spot ; head spotted and marbled with dark purplish 

 brown ; lower jaw and lower part of opercular region bright yellow ; dorsal and caudal 

 fins bright yellow, spotted with dark brown ; pectoral yellow ; branchiostegal 

 membrane, pectoral region, outer edge of ventrals, and anal vermilion-red. 



Total length 120 millim. 



Two specimens of this handsomely-coloured fish, which bears the native name 

 "Kasanga Malengi " on M. Dardenne's coloured sketch. 



15. TiLAPiA MicEOLEPis, sp. n. (Plate XX. fig. 3.) 



Teeth very small, in 4 series close together in both jaws, outer larger, bicuspid, with 

 a principal and a small lateral cusp. Depth of body 3f to 4 times in total length, 

 length of head 3. Snout with straight or slightly convex upper profile, once and a half 

 the diameter of the eye, M'hich is nearly 4 times in length of head and equals inter- 

 orbital width ; mouth moderate, its width f that of the head, extending to between 

 nostril and eye ; 7 or 8 rows of scales on the cheek ; larger scales on the opercle. 

 Gill-rakers short, rather thick, 13 or 14 on lower part of anterior arch. Dorsal XVI- 

 XVII 14-15 ; spines subequal in length from the fifth or sixth, measuring ^ length of 

 head and a little shorter than longest soft rays. Pectoral acutely pointed, | length 

 of head, not extending to origin of anal. Ventral widely separated from vent. Anal 

 III 9 ; third spine as long as and a little stronger than longest dorsals. Caudal with 

 deep crescentic notch. Caudal peduncle twice as long as deep. Scales cycloid, 80-90 

 29=30' ^^*- -^^ 38=44- Pale olivc-brown above, white below; faint dark bars across the 

 back and four round dark spots on each side, the last at the root of the caudal ; fins 

 yellowish. 



Total length 115 millim. 



Two specimens. — Native name: " Mocupi." 



As in Tilapia desfontainesi, the dentition of this species may be regarded as 

 connecting Tdapia with ParatUa'pia. 



16. Tilapia grandoculis, sp. n, (Plate XIX. fig. 6.) 



Teeth very small, in 4 or 5 series in both jaws, of outer series larger, bi- or tricuspid, 



