STNODONTIS. 



453 



4 times in total length. Head as long as broad, finely granulate above ; 

 snout rounded, f or a little less than ^ length of head; eye supero- 

 lateral, oj to 4J times in length of head, 1| to 2 times in interorbital 

 width ; lips moderately developed ; prfemaxillary teeth forming a short, 

 broad band; movable mandibular teeth hardly ^ diameter of eye, 40 to 

 65 in number. Maxillary barbel not margined, at least twice as long 

 as head, reaching or nearly reaching base of ventral ; mandibular barbels 

 with long, slender branches, outer twice as long as inner and longer than 



Fig. 340. 



Synodontis greshoffi. 

 Type. 



head. Gill-opening not extending downwards beyond root of pectoral 

 spine. Occipito-nuchal shield finely granulate, tectiform, longer than 

 broad, with obtuse or rounded posterior processes. Humeral process at 

 least twice as long as deep, striated and keeled, acutely pointed, extend- 

 ing as far back as, or a little beyond, occipito-nuchal process. Skin 

 villose on the sides. Dorsal I 6-7 ; spine scarcely curved, as long as 

 head, smooth in front, feebly serrated behind. Adipose dorsal 3g to 

 4 times as long as deep, 2 to 3 times as long as its distance from rayed 

 dorsal. Anal III 8-10. Pectoral spine at least as long as. head, 

 strongly serrated on both sides. Ventral reaching. or not anal. Caudal 



