542 Mr. G. A. Boulenger on Fishes 



Kneriidae. 



8. Xenopomatichthys ansorgii, sp. n. 



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

 length. Snout rounded, nearly as long as eye, which is 

 perfectly lateral, visible from below as well as from above, 

 3^ times in length of head and 1^ times in interorbital 

 width ; width of mouth equal to diameter of eye ; sides and 

 lower surface of head with conical horny tubercles ; cup- 

 shaped apparatus on operculum much larger than eye, 

 followed, on the scapular region, by a large lamellar pad 

 (18 or 19 lamellae). Dorsal III 7, originating at equal 

 distance from eye and from root of caudal, well behind 

 vertical of base of ventral. Anal III 8-9. Pectoral shorter 

 than head. Caudal deeply notched, crescentic. Caudal 

 peduncle half as deep as long *. Scales longitudinally 

 striated, 110-120 in lateral line, 16-18 between dorsal and 

 lateral line, 10-11 between lateral line and ventral. Pale 

 brownish above, yellowish beneath, with scattered dark 

 brown dots and a series of round blackish spots, connected 

 by a dark brown lateral band, just above the lateral line ; 

 fins uniform whitish. 



Total length 67 mm. 



Two specimens from the Lucalla Ptiver at Lucalla. 



This fish, one of the most interesting of Dr. Ansorge's 

 discoveries in Angola, shows Xenopomatichthys to be un- 

 questionably related to Kneria. X. ansorgii is easily dis- 

 tinguished i'rom X. auriculatus, Pellegrin, by the longer body, 

 the number of branched rajs in the dorsal (7 instead of 8) 

 and anal (8-9 instead of 6-7), and the number of scales in 

 the lateral line (110-120 instead of 60-65). 



Characinidse. 

 9. Alestes ansorgii, sp. n. 



Depth of body 3f to 4£ times in total length, length of 

 head 4£ to 5 times. Head If to 2\ times as long as broad, 

 1^ to 1£ times as long as deep; snout as long as or shorter 

 than eye, which is lateral and 2^ (young) to 3^ times in 



* In the description of X. auriculatus in Brit. Mus. Cat. Afr. Fish. i. 

 p. 172, " Caudal peduncle half as long as deep " is a lapsus calami, and 

 should be corrected to " Caudal peduncle half as deep as long." 



