of the Genus Pellonula &c, 205 



above or immediately behind base of pelvic;^, nearly equi- 

 distant from base of caudal and end of snout. Anal 17-19. 

 Caudal peduncle as long- as deep. Vertebrai 42. 



Lower Congo and Angohi. 



Nine specimens, 13 to 160 mm. loriir, including the types 

 from Angola and two from Boma and from Vivi, Lower 

 Congo. 



6. Odaxoturissa, Boulen-^'. 1899. 



Differs from Pe.llo'iula in the very prominent lower Jaw, 

 with a pair of strong canines anteriorly ; prsemaxillary teeth 

 uniserial, with a canine on each side. 



1. Odaxothrissa vittata, sp. n. 

 Odaxothrissa losera (part.), Bouleng. Cat. Afr. Fisli. i. p. 160 (1909). 



Depth of body 4l\ in the length, length of head o|. 

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

 head; maxillary extending to below middle of eye ; canines 

 very strong, (iill-rakers shorter than gill-tilaments, 22 or 23 

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

 series, 14 in a transverse series; ventral scutes 12 + 9. 

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

 of snout, immediately beliind base of pelvics. Anal 21- 

 Caudal peduncle 1^ 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. Mus. Congo, Zool. i. 1899, p. 64^ 

 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 eye, which is 3|- to 4^ in length of head ; max- 

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

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

 a longitudinal, 14 in a transverse series ; ventral scutes 

 11 + 9. Dorsal 16-17 ; origin equidistant from end of snout 

 and base of caudal, immediately behind base of pelvics^ 

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

 band vestigial. 



Upper Congo. 



