22. SYNODONTIS FUELLEBORNI. 

 Hilgend. & Pappenh. Sitzb. Ges. naturf. Fr. Berl. 1903, p. 265. 



Depth of body 4 times in total length, length of head 3J times. 

 Head granulate above ; snout obtusely conical, as long as postocular 

 part of head ; eye supero-lateral, 5 times in length of head, twice in 

 interorbital width ; 51 movable mandibular teeth. Maxillary barbel 

 with distinct marginal membrane at base, reaching extremity of humeral 

 process ; outer mandibular barbel reaching base of pectoral spine, with 

 moderately long, simple branches, inner shorter, with short and thick, 

 feebly ramified branches. Gill-opening not extending downwards 

 beyond root of pectoral spine. Occipito-nuchal shield tectiform, with 

 obtuse posterior processes. Humeral process triangular, keeled, not 

 extending so far back as occipito-nuchal process. Dorsal 1 7 ; spine 

 a little shorter than head. Adipose dorsal about twice as long as its 

 distance from rayed dorsal. Anal IV 8. Pectoral spine shorter than 

 head, not reaching ventral, more strongly serrated on inner than on 

 outer border. Ventral not reaching anal. Caudal deeply forked. 

 Brownish, with irregular dark spots; fins with dark bands. 



Total length 115 millim. 



Lake Rukwa, east of Lake Tanganyika. — Type in Berlin Museum. 



23. SYNODONTIS EUPTERUS. 



Bouleng. Ann. & Mag. N. H. (7) viii. 1901, p. 11, and Fish. Nile, p. 369, 

 pi. lxviii. (1907). 



Depth of body 3 times in total length, length of head 3^ to 4 t'mes. 

 Head a little longer than broad, rugose, granulate on vertex and occiput 

 and in front of eyes; snout rounded, as long as postocular part of head ; 

 eye supero-lateral, 3§ to 4 times in length of head, 1^ to If times in 

 interorbital width ; lips rather feebly developed ; prremaxillary teeth 

 forming a short and broad band ; movable mandibular teeth barely 

 5 length of eye, 45 to 50 in number. Maxillary barbel with a 



