Four new Ajriciin Freshwater Fishes. 81 



longest dorsals. Pectoral pointeil, | the length of the liea'l, 

 not reaching the ventral, which does not extend beyond the 

 vent. Caudal forked. Caudal peduncle not twice as long as 

 deep. Scales 52-55 ^^, 3 between the lateral line and the 

 root of the ventral. 10 to 12 more or less distinct dark 

 vertical bars on each side of the body. 



Total length 180 niillini. 



{Several specimens from Waly Haifa, Upper Nile, c)lle:tel 

 by Mr. W. L. S. Loat. 



Ch rysichthys Sha rp ii. 



Depth of body 5^ times in total length, length of head 

 4 times. Head much depressed, ^ longer than broad, nearly 

 smooth above; snout broadly rounded, projecting a little 

 beyond the lower jaw, measuring nearly ^ the length of the 

 head and ^ the width of the mouth; eye oval, ^ length of 

 head, § interocular width ; occipital process smooth, a little 

 longer tlian broad, in contact with the iiiterspinous shield ; 

 nasal barbel very thin, § the diameter of tiie eye; maxillary 

 barbel ^ the length of the head, not reaching tlie base of the 

 pectoral spine ; inner mandibular barbel § the lengtli of the 

 outer, which measures | the length of the head. Vomero- 

 pterygoid teeth forming a crescentic band hardly interrupted 

 niesially, this band measuring nearly half the width of the 

 band of pr^emaxiilary teeth. Dorsal 1 5; spine finely 

 striated, not serrated, half as long as the head ; longest soft 

 ray \ the length of the head. Adipose dorsal not longer than 

 deep, its base half that of the rayed fin and 7 times in the 

 distance intervening between the two fins. Anal V I'd. 

 Pectoral spine as long as dorsal spine, striated, with 12 rather 

 strong retrorse serra? on the inner edge. Ventral not reaching 

 anal. Caudal deeply forked, with long pointed lobes, the 

 longest rays nearly 3 times as long as the median. Caudal 

 peduncle not quite twice as long as deep. 



Total lengtii 370 millim. 



A single specimen, a skin, from Lake Mwero, presented to 

 the British Museum by Jlr. Alfred Sharpe, C.B. 



Mastacembelus Greshoffi. 



Depth of body 19 times in total length, length of head 9 

 times. Vent much nearer the end of the snout than the cau lal 

 fin, its distance from the head 3 times the length of the latter. 

 Snout 3 times as long as the eye, which is a little shorter than 

 the trifid rostral appendage; buccal elett extending to below 



Ann. dt Mug. N. Hist. 8er. 7. Vol. vii. G 



