SYXODONTIS. 



423 



18. SYNODONTIS NEBULOSUS. 

 Peters, Mon. Befl. Ac. 1852, p. 682, and Reise Mossamb. iv. p. 28, pi. v. fig. 1 

 (1868). 

 Depth of body 5 times in total length, length of head 3§ times. 

 Head a little longer than broad, rugose above from between the eyes ; 

 snout as long as postocular part of head ; eye superolateral, 4| times 

 in length of head, twice in interorbital width ; lips moderately de- 

 veloped ; praemaxillary teeth forming a short and broad band ; movable 

 mandibular teeth not ^ diameter of eye, 18 in number. Maxillary 



Fig. 318. 



: A?:Zz 



Synodontis nebulosus. 

 Type, after Peters (Reise Mossamb.). if. 



barbel not margined, a little shorter than head, reaching a little beyond 

 base of pectoral spine ; outer mandibular barbels twice as long as inner, 

 with short simple branches, inner with very short, bifid branches. 

 Gill-opening not extending downwards beyond base of pectoral spine. 

 Occipito-nuchal shield rugose like the occiput, as long as broad, 

 posterior processes pointed. Humeral process not longer than broad, 

 obtusely pointed, not extending so far back as occipito-nuchal process. 

 Dorsal I 7 ; spine shorter than head, smooth in front, serrated behind. 

 Adipose dorsal about 5 times as long as deep, as long as its distance 

 from rayed dorsal. Anal IV 8, pointed in front. Pectoral spine shorter 

 than head, feebly serrated on outer border, strongly on inner. Ventral 

 nearly reaching anal. Caudal deeply notched. Caudal peduncle a little 

 longer than deep. Yellowish green above, with ill-defined, irregular, 



