SILUKID.E. 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 seiTated on inner side. 

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

 length of mediiin. 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 



;5. (^HIJYSTCHTHVS ACUTIHOSTRIS, Gthr. 



2-3. Ad. & yg. Quauza R. at Dondo. Dr. W. J. Ansorge (0.). 



4. Ad. Luculla R. at Kalenga. „ 



5-7. Ad. & yg. Bengo R. at Cabiri. „ 



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



4. 0HRY8I0HTHYS FURCATUS, Gllir. 



Add:— 



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



Kuka Muno. 



11. Ad. Geba R. at Bafata, Portug. 



Guinea. 



4 a. GHRYSICHTHY>S BOOAGII. 

 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 

 q\ to 4 times in length of head, If to 1^ times in interocular width; 

 mouth inferior, its width 2\ times in length of head ; prsemaxillary 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 If diameters of eye, maxillary 1^ to 1^ 

 lengths of head, outer mandibular f to f, inner mandibular f to 4. 

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

 Dorsal I 6, \^ to If as distant from root of caudal as from end of snout; 

 spine strong, feebly serrated behind, | length ot 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 



