SILUR1D.E. 



319 



lateral, 5 times in length of head, If times in interorbital width ; lips 

 moderately developed ; prsemaxillary teeth forming a short and broad 

 band ; movable mandibular teeth f diameter of eye, 25 in number. 

 Maxillary barbel with a broad marginal membrane at base, as long as 

 head, reaching a little beyond base of pectoral spine ; outer mandibular 

 barbel about twice as long as inner, former with long slender branches, 

 latter with ramified brauches. Gill-openings not extending downwards 

 beyond root of pectoral spine. Occipito-nuchal shield rough like the 

 occiput, very obtusely tectifovm, 1^ times as long as broad, with rounded 



Fig. 188. 



Synodonlis sieindachneri. 

 Type. f. 



posterior processes. Humeral process acutely pointed, longer than 

 broad, granulate, without keel, extending as far back as occipito-nuchal 

 process. Dorsal I 7 ; spine as long as head, feebly curved, striated, 

 with feebly retrorse serrae in front in its upper part, strongly serrated 

 behind. Adipose dorsal 3 times as long as deep, as long as its distance 

 from rayed dorsal. Anal IV 6, obtusely pointed in front. Pectoral 

 spine slightly shorter than dorsal, not reaching ventral, strongly serrated 

 on outer border, very strongly on inner. Caudal deeply forked, upper 

 lobe the longer. Caudal peduncle as long as deep. Dark olive-brown, 

 body finely speckled with black. 



