STN0D0NT1S. 



443 



branches, outer twice as long as inner. Gill-opening not extending 

 downwards beyond root of pectoral spine. Occipito-nuchal shield 

 granulate like the occiput, obtusely tectiform, a little longer than broad, 

 with posterior processes truncate. Humeral process granulate, not 

 keeled, little longer than broad, obtusely pointed, extending nearly as 

 far back as occipito-nuchal process. Dorsal I 7 ; spine as long as head, 



Fig. 332. 



Si/nodontis partialis. 

 Type. |. 



feebly curved, striated, smooth in front, serrated behind. Adipose 

 dorsal 3 to 4 times as long as deep, as long as or a little shorter than 

 its distance from rayed dorsal. Anal IV 7, obtusely pointed in front. 

 Pectoral spine strongly serrated on both sides. Ventral not reaching anal. 

 Caudal fin deeply notched, cresceutic. Caudal peduncle about as long 

 as deep. Pale brown above, white beneath ; head with numerous small 

 round dark brown spots ; body with large round dark brown spots, the 

 ground-colour between them forming a light network ; fins white, with 

 more or less regular, horizontal, oblique black bands, 5 to 7 across 

 dorsal, 3 or 4 on ventral and anal, 7 to 11 on caudal. 



Total length 200 millim. 



Ja River (Congo System), South Cameroon. 



