SYKODONTIS. 371 



8. SYNODONTIS FILAMENTOSUS. 



(Plate LXIX.) 



Boulenger, Ann. & Mag. N. H. (7) viii. 1901, p. 10. 



Body moderately compressed, its depth equal to the length of the head and four 

 times in the total length. Head once and one-fifth as long as broad, as deep as broad, 

 feebly rugose between the eyes and on the occiput ; snout rounded, as long as the 

 postocular part of the head ; frontal fontanelle rather large ; eye superolateral, its 

 diameter three and a half times in the length of the head and once and one-third 

 in the width of the interorbital region, which is slightly convex; occiput simply 

 convex. Mouth with moderately developed lips ; praemaxillary teeth rather few, 

 forming a short and broad band ; movable mandibular teeth barely one-fourth the 

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

 four-fifths the length of the head, extending to the base of the pectoral fin; 

 mandibular barbels with numerous long ramified branches, the outer inserted a little 

 further back than and once and a half as long as the inner. Gill-opening not 

 extending downwards beyond the root of the pectoral fin. Occipito-nuchal shield 

 slightly rugose, obtusely tectiform, once and one-third as long as broad, the posterior 

 processes rounded. Humeral process a little longer than broad, flat, rounded behind, 



Measurements (in millimetres). 



Total length 180 



,, „ (without caudal) 162 



Greatest depth 40 



Length of head 40 



Width o£ head 32 



Length of snout 16 



Diameter of eye 12 



Interorbital width 16 



"Width of mouth 12 



Maxillary barbel 32 



Outer mandibular barbel 26 



Inner mandibular barbel 17 



Length o£ dorsal spine 41 



Basal length of dorsal fin 23 



„ „ adipose fin 54 



Greatest depth of adipose fin 12 



Length of pectoral spine 39 



3b2 



