LATES. 100 



limb, with 2 or 3 widely separated spines on its lower border, and with 

 one or two very strong spines at the angle ; a strong opercular spine ; 

 2 to 5 strong spines on the clavicle. 13 to 16 gill-rakers on lower part 

 of anterior arch. Dorsals VII, I-II 11-12, contiguous or completely 

 separated ; first spine very short or minute, third very strong, longest, } 

 (adult) to I (young) length of head ; longest soft rays J to ^ length of 

 head. Anal III 8-9 ; spines short, second and third equal. Pectoral 

 J to I length of head. Caudal truncate or slightly emarginate. Caudal 

 peduncle If to 2 times as long as deep. Scales 100-130 2^36- Silvery, 

 back olive-grey, spinous dorsal brown ; young spotted or marbled with 

 dark brown. 



Reaches a length of 1340 millim. 



Lake Tanganyika. 



1-2. Types. Kinyanikolo. Prof. J. E. S. Moore (C). 



3-5. Ad. & Jigr. Niamkolo. Dr. W. A. Cunnington (C). 



6-7. Yg. Kituta. „ 



8. Hgr. Kilewa Bay. Dr. L. kStappers (C). 



9-10. Hot. Mouth of Little Rusisi R. 



11-13. Ad. & ho-r. Middle of lake, in deep Prof. J. E. S. Moore (C). 



water. 



14. Yg. L. Tanganyika. „ 



15. Skel. Albertville. Capt. Hecq (C). 



3. LATES ANGUSTIFRONS. 

 Bouleng. Tr. Zool. Soc. xvii. 190G, p. 555, pi. xxxv. fig. 1. 



Depth of body 3J times in total length, length of head 3 times. 

 Upper profile of head nearly straight; snout a little longer than eye, 

 which is 4 to 4^ times in length of head and nearly double interorbital 

 width ; lower jaw projecting ; maxillary extending to below anterior 

 third or centre of eye, the width of its distal extremity f to ^ diameter 

 of eye ; prse- and suborbitals finely serrated ; cheeks, opercles, and 

 occiput covered with small scales ; praeopercular border forming nearly 

 a right angle, finely toothed on its vertical limb, with 3 widely separated 

 spines on its lower limb, and with a very strong spine at the angle ; a 

 strong opercular spine ; 4 or 5 strong spines on the clavicle. 14 gill- 

 rakers on lower part of anterior arch. Dorsals VII, I 11-12, connected 

 at the base; first spine minute, third very strong, longest, about ^ to § 

 length of head ; longest soft rays J to nearly J length of head. Anal 

 III 8 ; spines short, second and third equal. Pectoral ^ or not quite } 



