4G0 



SILUR1D-E. 



47. SYNODONTIS FILAMENTOSUS. 

 Bouleng. Ann. & Mag. N. H. (7) viii. 1901, p. 10, and Fish. Nile, p. 371, pi. lxix. 

 (1907). 

 Depth of body equal to length of head, 4 times in total length. Head 

 1£ times as long as broad, feebly rugose between eyes and on occiput ; 

 snout rounded, as long as postocular part of head ; eye supero-lateral, 

 H times in length of head, 1§- times in interorbital width; occiput 

 simply convex ; lips moderately developed ; prsemaxillary teeth rather 

 few, forming a short and broad band ; movable mandibular teeth barely 

 I length of eye, 20 in number. Maxillary barbel broadly margined at 

 the base, -f- length of head, extending to base of pectoral fin ; mandi- 



Fig. 345. 



Synodontis filament osus. 

 Type (P. N.). §. 



bular barbels with numerous long ramified branches, outer 1J times as 

 long as inner. Gill-opening not extending downwards beyond root of 

 pectoral fin. Occipito-nuchal shield slightly rugose, obtusely tectiform, 

 1^ times as long as broad, posterior processes rounded. Humeral 

 process a little longer than broad, fiat, rounded behind, extending as 

 far back as occipito-nuchal process. Dorsal I 7 ; spine strong, feebly 

 serrated behind, striated in front, as long as head, with a filamentous 

 prolongation exceeding it in length. Adipose dorsal i\ times as long- 

 as deep, twice as long as its distance from rayed dorsal. Anal IV 7, 



