SYNODONTIS. 455 



lateral, 3 to 3^ times in length of head, equal to interorbital width ; 

 lips moderately developed; prsemaxillary teeth forming a short, broad 

 band; movable mandibular teeth hardly ^ diameter of eye, 18 to 25 in 

 number. Maxillary barbel not margined, 3^ to 4| times length of head, 

 reaching caudal peduncle or caudal fin ; mandibular barbels with long, 

 slender branches, outer at least twice as long as inner and 1| to 2 times 

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

 pectoral spine. Occipito-nuchal shield rugose like the occiput, obtusely 

 keeled, with obtuse or rounded posterior processes. Humeral process 

 rugose, striated above, short and broad, its point obtuse or truncate, 

 hardly extending so far back as occipito-nuchal process. Dorsal I 7 ; 

 spine scarcely curved, as long as or a little longer than head, smooth in 

 front, feebly serrated behind. Adipose dorsal 3 to 4 times as long as 

 deep, narrowly separated from rayed dorsal. Anal III-IV 8-9. Pectoral 

 spine as long as or a little shorter than head, strongly serrated on both 

 sides. Ventral not quite reaching anal. Caudal deeply notched, upper 

 lobe more or less prolonged into a filament. Caudal peduncle deeper 

 than long. Olive or brownish above, uniform or spotted with dark 

 brown ; caudal fin, often also dorsal and anal, with very numerous small 

 dark spots, forming transverse series. 

 Total length 160 millim. 



types. Kiiishassa, Stanley Pool. M. A. Greshoff (0.) ; 



Utrecht University (E.)- 

 Leopoldville, Stanley Pool. Capt. Wilverth (C). 



M. P. Delhez (0.). 

 Kondue, Kasai R. M. Luja (0.) ; 



Luxemburg Museum (P.). 

 Tilonsembe. Upper Congo. Rev. J. H. Weeks (C). 



Banzvville, Ubanglii. Capt. Royaux (C). 



44. SYNODONTIS BATESLI. 

 Bouleng. Ann. & Mag. N. H. (7) xx. 1907, p. 50. 



Depth of body 3^ to 4£ times in the total length, length of head 3 to 

 3^ times. Head a little longer than broad, rugose above; snout obtusely 

 pointed, as long as postocular part of head ; eye supero-lateral, 4 to 5^ 

 times in length of head, If to 2| times in interorbital width ; prse- 

 maxillary teeth forming a short, broad band ; movable mandibular teeth 

 not half diameter of eye. 30 to 40 in number,; maxillary barbel not 





Congo. 



1, 



2. Hgr., 



3. 



Ad. 



4. 



Ad. 



5. 



Yg- 



6- 



-7. Ad. 



8. 



Ad. 



