some Freshwater Fishes from Lower Congo. 175 



margins, not extending quite as far back as occipital nuchal 

 process. Dorsal I 6. Dorsal spine a little more than £ the 

 length of the head, striated in front and on the sides, minutely- 

 denticulated behind. B;ise of adipose dorsal not quite twice 

 as long as its distance from rayed dorsal, the base of which is 

 1^ the distance between both dorsals. Anal III 8. Pectoral 

 spine longer than dorsal spine, serrated behind. Ventrals 

 nearly reaching anal. Caudal deeply forked (both lobes are 

 truncated, and appear to have been bitten off during life and 

 healed). Caudal peduncle (from adipose fin) a little longer 

 than deep. Colour in spirit brownish olive, with numerous 

 roundish dark spots on head and body as well as on fins. The 

 spots on the sides of the body are about 10 mm. in diameter, 

 those on the head and the fins onlj' about half that size or 

 less. 



Phractura booei, Perugia. 



Native name " Ntiki-ntiki." 

 Locality. Lower Congo. 

 Two specimens. 



Belonoylanis nudipectus, sp. n. 



Native name " Ntiki-ntiki." 



Locality. Lower Congo. 



One specimen, 110 nun. in total length (s. c ). 



Depth of body about 13| times in total length, length of 

 head 8£ times. Head much depressed, li times its long as 

 broad, rugose above ; the A-shaped ridge on the snout not so 

 much pronounced as in B. tenuis, and its branches divide 

 further backwards than in the species mentioned {cfr. tig.), 

 about on the level with the posterior nostrils. Occipital 

 process trilobate, but the lateral branches more slender and 

 more diverging from the mesial line than in B. tenuis 

 {cfr. fig.). Snout pointed, a little less than | length of head, 

 strongly projecting beyond mouth. Eye 1\ times in length 

 of head, l\ tunes in interorbital width. No rounded rugose 

 process on coracoid below base of pectoral. First dorsal I 7, 

 first ray longer than head. Anal 8. Pectoral a little longer 

 than head, not reaching ventral; the latter widely separated 

 from anal. Caudal about half the length of head, rather 

 deeply cleft. Caudal peduncle very thin and depressed, 

 I total length. The azygous plate in front of the dorsal fin 

 is broader behind than in front {cfr. fig.), unlike the condition 

 in B. tenuis, Blgr., in which it appears to be broader in front 

 than behind. From the origin of the dorsal 22 pairs of dorsal 



