siLUtfiiu:. 299 



a space equal to 2\ to 2£ times its base. Anal 13-14, 8-9 rays branched. 

 Pectoral spine about % length of head, strongly serrated on inner side. 

 Caudal deeply forked, with pointed lobes, longest rays 2-f- to 2\ times 

 length of median. Caudal peduncle 1^ times as long as deep. 



Total length 376 millim. 



Lake Tanganyika. — Types in Vienna Museum. 



Closely allied to C. sharpii, but head and adipose dorsal fin larger. 



Add 



3. OHRYSICHTHYS ACUTIROSTRIS, Gthr. 



2-3. Ad. & yg. Qmmza R. at Dondo. Dr. W. J. Ansorge (C). 



4. Ad. Luculla R. at Kalenga. „ 



5-7. Ad. & yg. Bengo R. at Cabin. ,, 



8-12. Ad., ligr., & yg. „ ., Quifangondo. „ 



Add :- 



4. OHRYSICHTHYS FURCATUS, Gilir. 



10. Ad. Lebuzi R. (Chiloango) at Dr. W. J. Ansorge (C). 



Kuka Muno. 



11. Ad. Geba R. at Bnfata, Portng. ,, 



Guinea. 



4 a. CHRYSICHTHYS BOCAGII. 

 Bouleng. Ann. & Mag. N. H. (8) vi. 1910, p. 557. 



Depth of body i\ to 4f times in total length, length of head 3^ times. 

 Head moderately depressed, 1^ times as long as broad, its upper surface 

 slightly rugose, covered with thin skin ; occipital process narrow, 

 extending to the small interneural shield ; snout obtusely pointed ; eye 

 3-^ to 4 times in leDgth of head, 1^ to 1^ times in iuterocular width; 

 mouth inferior, its width 2\ times in length of head ; pisemaxillary band 

 of teeth nearly straight, 3 times as long as broad ; vomero-pterygoid 

 teeth not much developed, forming a narrow band interrupted in the 

 middle ; nasal baibel 1 to 1^ diameters of eye, maxillary 1-|- to \\ 

 lengths of head, outer mandibular \ to f, inner mandibular •§■ to \. 

 Gill-rakers rather long, 15 to 17 on lower part of anterior arch. 

 Dorsal I 6, 1^ to 1§ as distant from root of caudal as from end of snout ; 

 spine strong, feebly serrated behind, f length of head ; first and second 

 soft rays longest, as long as head, reaching or nearly reaching adipose 

 fin when folded ; adipose fin as long as base of rayed dorsal, \ as long as 

 its distance from latter. Anal 13, 9 rays branched. Pectoral shorter 



