274 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.56. 



ill-defined band along middle of side silvery white, with slightl}^ leaden 

 undershade at lino within silvery area. Fins all pale brownish, ends 

 of dorsal rays blackish. Fourteen examples, 118 to 148 mm. Quanza 

 River. 



These all differ from Boulenger's figure ^ as it does not show 

 the caudal lobes s(5aled basally above and below, the upper dorsal edge 

 not emarginate, while the dark median lateral band bends a little 

 below, so to appear nearly concurrent with the lateral line, doubtless 

 conditions of age. 



BARILIUS ANSORGII Boulenger. 



Two examples, 83 to 105 mm., labeled "West Africa," from the 

 Echpse Expedition, are included here as they may have been obtained 

 in Angola. Head, 3* to 3i; depth, 3f to 4i; D. ii, 7; A. in, 13 or 14; 

 scales 40 or 41 in lateral line to caudal base and 3 more on latter. 



ALESTES ANSORGII Boulenger. 



Head, 4 to 4f ; depth, 3* to 3|; D. ii, 8; A. iii, 17 to 19; scales, 34 

 to 38 in lateral line to caudal base and 2 or 3 more on latter; 6 scales 

 above lateral line, 3 below to anal; predorsal scales, 15 to 17; snout 

 3 to 3* in head ; eye, 3 J to 4 ; maxillary, 2| to 3 J ; interorbital, 2§ to 3. 

 Elongate, slightly ovoid or lower profile more convex, deepest at 

 ventral origin. Caudal peduncle compressed, about deep as long; 

 least depth, 2^ to 2f in head. Head width, If to 2 in its length. 

 Snout conic; length, three-fourths to four-fifths its width. Eye 

 large, with broad adipose lid, advanced or hind pupil edge slightly 

 before center in head length. Mouth broad, gape short or to nostrils, 

 about midway in snout length. Lips thick, tough. Upper teeth in 

 2 rows, 6 outer smaller with 3 to 5 points; 7 inner broader with 7 or 8 

 points; and in ail median point largest. Lower teeth 8, large except 

 last lateral, with 5 to 7 points, and median point enlarged. Also 

 pair of smaller conic teeth, close inside, outer medially. Maxillary 

 extends slightly behind nostril, not quite to eye. Nostrils together, 

 midway in snout length. Interorbital convex. Broad suborbitals 

 not completely covering cheek, leave narrow naked strip below. 

 Rakers, ll-f-17, lanceolate, rather flexible, 2 in filaments. If in eye. 

 Scales large; basal striae 1 to 5 and apical 2 to 6; fewer in half- 

 grown. Dorsal origin midway between snout tip and caudal 

 base; slightly more advanced in half -grown; first branched ray, 

 IJ to H in head. Adipose fin, 1 J to IJ in eye. Anal inserted about 

 opposite depressed dorsal tip, slightly advanced in half -grown; first 

 branched ray, 1-| to 2 in head. Caudal well forked, lower lobe 

 slightly longer, 1 +i to 1+i in head; pectoral, IJ to U, ventral, 

 IJ to If. Color in alcohol uniform brownish above, sides and fins 

 all paler. Body -with silvery reflections, but no dark blotches on 



I Cat. Fresh-Water Fish. Africa, vol. 2, 1911, p . 131, fig. 108. 



