400 



SILUEID.^. 



3. SYNODONTIS ACANTHOMIAS. 

 Sijnodontis omias (non Giintli.), Vaill. N. Arch. Mus^. (3) viii. 1896, p. 130, 



pi. xiii. fig. 2. 

 Synodcntis acantlwmias, Bouleng. Ann. Miis. Congo, Zool. i. p. 46, pi. xxiii. 



(1899), and Poiss. Bass. C^ongo, p. 310 (1901> 



Depth of body equal to or a little greater than length of head, 3§ 

 to 4^ times in total length. Head as long as broad or slightly longer 

 than broad, feebly rugose above from between the eyes ; snout obtusely 



Fiff. 303. 



.^•~.\ ^. 



Sj/nodontis acantJiomias. 

 Type (A. M. C). I 



pointed, IJ to 1^ times length of postocular part of liead ; eye supero- 

 lateral, 5^ to 7| times in length of head, 2 to 3 times in interorbital 

 width ; lips moderately developed ; preemaxillary teeth forming a broad 

 and rather short band ; movable mandibular teeth nearly J diameter of 

 eye, 36 to 50 in number. Maxillary barbel not distinctly margined, 

 1 to 1-|- times length of head, reaching anterior third or middle of 

 pectoral spine ; outer mandibular barbels twice as long as inner,, with 

 Ion'' slender branches, inner with shorter branches bearing tubercular 

 ramifications. Gill-opening not extending downwards beyond root of 

 pectoral spine. Occipito-nuchal shield obtusely tectiform, rough like 



