398 



SILUEID.E. 



moderately long branches with tubercular ramifications, outer a little 

 longer than inner and | length of head. Gill-opening not extending 

 downwards beyond root of pectoral spine. Occipito-nucbal shield 

 smooth, convex, only a little longer than broad, with posterior processes 

 sharply pointed or obtuse. Humeral process feebly striated, narrow and 

 sharply pointed, extending as far back as occipito-nuchal process. 

 Dorsal I 7 ; spine not very strong, hardly | length of head, smooth in 

 front, feebly serrated behind. Adipose dorsal 4 to 5 times as long as 

 deep, 2^ to 3-^^ times as long as its distance from rayed dorsal. Anal 

 III 8-9, rounded. Pectoral spine as long as or a little shorter th;in 



Fig. 301. 



tS^/nodoiUis caadaVts. 

 Type (A. M. C). f. 



head, strongly serrated on both sides, especially behind. Ventral nearly 

 reaching anal. C-audal deeply notched, both lobes produced into a long 

 filament. Caudal peduncle deeper than long. Uniform brownish. 



Total length 140 inillim. 



Congo. — Types in Congo Museum, Tervueren. 



\~i. Two of the typc.'^. Leopohh illc. ( 'nph Wilvcrtli (( '.). 



2. SYNODONTIS POLVOnON. 



Vaill. ('. U. Soc. Pliilom. Ibli;',, p. 4,s, ;.n.l N. Arch. Mu,<. (;5) viii. iSDi;, p. 127, 

 pi. xi. iio-. 1. 



Depth of body 4^ times in total lengtli, length of head 4 times. 

 Head slightly longer tlian broad, with feeble vermicular rugosities above; 

 snout rounded, \ length of head; eye supero-lnteral, OJ times in len<nh 



