TILAPIA. 



229 



equals or slightly exceeds interorbital width or least depth of prteorbital ; 

 mouth rather large, f to | width of head, extending to between nostril 

 and eye ; end of maxillary exposed ; teeth small, in 4 or 5 series, 44 to 

 60 in outer series of upper jaw ; 3 series of scales on the cheek, width 

 of scaly part less than diameter of eye. Gill-rakers short, 12 or 13 on 

 lower part of anterior arch. Dorsal XV-XVI 8-10 ; spines subequal 

 from the sixth or seventh, ^ to f length of head ; longest soft rays about 

 i length of head. Anal III 6-8 ; third spine as long as or a little 

 shorter than longest dorsal. Pectoral f length of head, not reaching 

 vertical of origin of anal. Ventral reaching vent or origin of anal. 

 Caudal rounded-subtruncate, or truncate. Caudal peduncle as long as 

 deep or a little longer than deep. Scales cycloid, or a few finely 



denticulated, 29- 



33 



3-5 



lateral lines 



19 -22 



Olive-brown above, pale 



11_12 ' •'<:'. ''>^A'li initio j^j^. 



yellow beneath ; seven to ten 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 oper- 

 cular 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. Young with 10 

 to 12 very distinct and regular dark bars. 



Total length 195 mi Him. 



Lake Tanganyika. 



Near Ujiji. 

 Moliro. 



1-3. Types. 



4. One o£ the types of 



2\ nihropunctata. 



5. Ad. 

 fi. Skel. 



7. Hgr. 



8. Ad. 



9. Ad, 



10-20, Hgr. & yg. 



E. Coode Hore, Esq. (C.)- 

 (Japt. Lemaire (C).), 



Niamkolo. 



Sumbu. 

 Tougvve. 

 Ka pa 111 pa. 

 Vua. 



Dr. W. A. Cuiinington ,(G.). 



Dr. L, iStappers (C. 



63. TILAPIA PERRIERI. 



Pellegr. Bull. Soc. Zool. France, 1909, p. 15G, and Mem. Soc. Zool. France, xxii. 

 1910, p. 295, pi. xiv. fig. 4. 



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

 Head a little more than twice as long as broad, with straight upper 

 profile ; snout a little shorter than eye, which is 3 to o^ times in length 



