LATES. 109 



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 | (young) length of head ; longest soft rays ^ to | length of 

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

 \ to f length of head. Caudal truncate or slightly emarginate. Caudal 

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

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

 dark brown. 



Reaches a length of 1340 millim. 



Lake Tanganyika. 



Kinyamkolo. Prof. J. E. S. Moore (C). 



Niamkolo. Dr. \Y". A. Ounnington (C). 



Kituta. ,, 



Kilewa Bay. Dr. L. Shippers (C). 



Mouth of Little Rosisi R. „ 



Middle of lake, in deep Prof. J. E. S. Moore (C). 



water. 



L. Tanganyika. „ 



Albertville. Capt. Hecq (C). 



3. LATES ANGUSTIFRONS. 

 Bouleng. Tr. Zool. Soc. xvii. 1906, p. 555, pi. xxxv. fig. 1. 



Depth of body 3^ 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 ; prseopercular 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 \ to nearly \ length of head. Anal 

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



1- 



-2. Types. 



3- 



-5. Ad. & hgr. 



6- 



-7. Yg. 



8. 



Hgr. 



9- 



-10. Hgr. 



11- 



-13. Ad. & hgr. 



14. 



Yg. 



15. 



Skel. 



