160 



clupeid^:. 



Olive above, white beneath, with a silvery lateral band ; sometimes a 

 large dark spot on gill-cover and scapular region and another at base of 

 caudal. 



Total length 75 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 



Pig. 127. 



1. One of the types. 

 2-3. Ad. 

 4. Ad. 



0^ 



Pellonula acutirostris. 

 Type (A.M. 0.). f. 



Coquilhatville, Upper Congo. 

 Upper Congo. 

 Banzyville, Ubanghi. 



M. P. Delhez (C). 

 Brussels University. 

 Capt. Boyaux (C). 



3. ODAXOTHRISSA. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 64 (1899), and Poiss. Bass. Congo, p. 127 

 (1901). 



Mouth large ; sharp conical teeth in each jaw, with a large canine- 

 like tooth on each side, directed backwards ; minute teeth on the 

 maxillary ; conical teeth on the palatines and on the tongue ; maxillary 

 formed of two pieces. Branchiostegal rays 7. Body strongly compressed, 

 with an abdominal serrature formed of bony scutes ; scales moderate ; 

 no lateral line. Dorsal fin short, behind vertical of ventrals ; anal rather 

 long, with 21 or 22 rays. Ventrals with 9 rays. 



Congo. 



1. ODAXOTHRISSA LOSERA. 

 Bouleng. 11. cc. pp. C4, 128, pi. xxxi. fig. 1. 



Depth of body equal to or a little less than length of head, 3J to 4 

 times in total length. Snout rounded, - s length of head, equal to 

 diameter of eye, which is greater than interorbital width ; chin projecting 

 strongly beyond the snout ; maxillary extending to below centre of eye. 

 Gill-rakers much shorter than gill-filaments, 18-20 on lower part of 

 anterior arch. Dorsal 16-17, originating immediately behind vertical 

 of base of ventrals, at equal distance from end of snout and from caudal. 



