338 



Annals of the South African Museum. 



HYDROCYON LINEATUS, Blkr. 

 (Tiger-fish; Ingwesi (Barotse) ; Sinwenyi (Batoke).) 



Hydrocyon lineatus, Bleek., Nat. Verb. Ver. Haarl. xviii., 1862, 

 No. 2, p. 125 ; Bouleng., Cat. Fresh. Fish. Africa, i., p. 182 (1909). 



Teeth ; 10 on each jaw, of which 4 on each jaw are larger and 

 stronger than the others, the posterior tooth on each side of the 

 lower jaw being minute and close to the preceding one. Depth of 

 body a little more than 5 times in total length excluding caudal ; 

 length of head 4 times. Head 2} times as long as broad ; snout a 

 little more than length of head ; diameter of eye 5-| times in length 

 of head, interorbital width 3i times; mouth extending to below 



FIG. 12. Hydrocyon lineatuK. 



nostrils ; maxillary bone, which is strongly curved on anterior 

 border, reaches to vertical of anterior border of eye ; suborbital and 

 opercular bones feebly striated. Gill-rakers shorter than gill-fringes, 

 8 on lower part of anterior arch. 



Dorsal ii 8, equally distant from eye and base of caudal, originating 

 in front of ventral ; second simple ray longest and nearly -J~ length 

 of head. Anal iii 12, 3rd simple ray longest. Pectoral f length of 

 head. Ventral f length of head, situated below anterior 3rd of 

 dorsal. Caudal deeply forked, with long pointed lobes ; caudal 

 peduncle 1J times as long as deep. Scales 46, lat. tr. 4 8 , ; 2 rows 



of scales between lateral line and scaly process at base of ventral, 

 3 rows between lateral line and base of ventral. 



Colour (of preserved specimen), grey, lighter on abdomen ; about 

 7 longitudinal streaks on body above lateral line and one below, the 



