from the Quanza and Bengo Rivers. 541 



and sphecodes, Sauv., is dedicated to Dr. P. Pappeuheiin, 

 of the Berlin Museum, who has contributed to our 

 knowledge of the Mormyrids. 



5. Marcusenius pauciradiatus, Stdr. 



A single specimen, 190 mm. long, from the Bengo River 

 at Cabiri. 



Native name : Libi. 



Clupeidae. 



6. Pellonula vorax, Gtlir. 



Quanza River at Cambambe and Dondo ; Bengo River 

 at Cabiri. 



7. Odaxothrissa ansorgii, sp. n. 



Depth of body equal to length of head, 3 to 3^ times in 

 total length. Snout as long as eye, which is 3 or 3,j times 

 in length of head and exceeds interorbital width ; chin 

 strongly projecting ; maxillary extending to below centre 

 of eye. Gill-rakers moderately elongate, 23-25 on lower 

 part of anterior arch. Dorsal 15-16, originating immedi- 

 ately behind vertical of base of ventral, at equal distance 

 from end of snout or anterior border of eye and from caudal. 

 Anal 17-19. Pectoral § length of head, not reaching 

 ventral. Caudal deeply forked, with pointed lobes. Caudal 

 peduncle as long as deep. 40-45 scales in longitudinal 

 series, 16-17 in transverse series ; 15-16 keeled scutes 

 between isthmus and ventrals, 10-12 between ventrals and 

 anal. Upper half, with dorsal and base of caudal pale olive- 

 green in life, lower half and other fins white ; a broad silvery 

 band along each side. 



Total length 160 mm. 



Several specimens. Quanza River at Cambambe ; Lucalla 

 River at Kalenge ; Bengo River at Cabiri. 



Native name : Mabemba. 



Well distinguished from the type of the genus by the 

 smaller number of rays in the anal fin (17-19 instead of 

 21-22) and of scutes in the abdominal serrature (15-16 + 

 10-12 instead of 17-18 + 9-10). 



