of the Genus Pellonula dbc. 205 



above or immediately behind base of pelvic", nearly equi- 

 distant f'roin base of caudal and end of snout. Anal 17-19. 

 Caudal peduncle as long as deep. Veilebrie ■i'l. 



Lower Congo and Angola. 



Nine specimens, 110 to 160 mm. long, including the types 

 from Angola and two from Boma and from Vivi, Lower 

 Congo. 



6. Odaxothrissa, Bouleng. 1899. 



Diflfers from Pe.llo'iula in the very prominent lower j.iw, 

 with a pair of strong canines anteriorly ; prseuKixillarj teeth 

 uuiserial, with a canine on each side. 



1. Odaxothrissa vittata, sp. n. 

 Odaxothrissa losera (part), Bouleng. Cat. Afr. Fisli. i. p. 160 (19D9). 



Depth of body 4^ in the length, length of head 3|w 

 Snout longer than diameter of eye, which is 4 in length of 

 head; maxillary extending to below middle of eye ; canines 

 very strong. Gill-rakers shorter than gill-Mlaments, 22 or 23 

 on lower part of anterior arch. 45 scales in a longitudinal 

 series, 14 in a transverse series; ventral scutes 12 + 1^. 

 Djrsal 16; origin a little nearer base of caudal than end 

 of snout, immediately behind base of pelvics. Anal 21, 

 Caudal peduncle Ij as long as deep. A well-detined silvery 

 lateral band. 



L^banghi River. 



A single specimen, 110 mm. long, from Banzyville. 



2. Odaxothrissa losera. 



Odaxothrissa losera, Bouleng'. Ann. Mas. Congo, Zoo!, i. 1899, p. 6^j^ 

 pi. xxxi. fig. 1. 



Depth of body equal to or a little less than length of head^ 

 which is 3^ in the length of fish. Snout a little longer than 

 diameter of eve, which is 31?- to 4i- in length of head : max- 

 illary extending to below anterior ^ or middle of eye. 27 

 gill-rakers on lower part of anterior arch. 44 to 46 scales in 

 a longitudinal, 14 in a transverse series ; ventral scutes 

 11 + 9. Dorsal 16-17 ; orig"in equidistant from end of snout 

 and base of caudal, immediately behind base of pelvicSi. 

 Anal 21-22. Caudal peduncle as long as deep. Lateral 

 band vestigial. 



Upper Congo. 



