452 



SILUHID^E. 



barbel not margined, ^ length of head, not quite reaching root of 

 pectoral spine ; mandibular barbels with long slender branches. Gill- 

 opening not extending downwards beyond root of pectoral spine. 

 Occipito-nuchal shield granulate like the occiput, convex, 1J times as 

 long as broad, with obtuse posterior processes. Humeral process much 

 longer than broad, granulate, pointed, not extending so far back as 

 occipito-nuchal shield. Dorsal I 7 ; spine striated, feebly granulate in 

 front at the base. Adipose dorsal i\ times as long as deep, 1J times as 

 long as its distance from rayed dorsal. Anal IV 8, pointed in front. 

 Pectoral spine A length of head, granulate on outer border, rather feebly 



Ym. 339. 



Synodontis xipliias. 

 Type. i. 



serrated on inner border. Ventral not reaching anal. Caudal deeply 

 notched. Caudal peduncle as long as deep. Uniform brownish. 



Total length 580 millim. 



Niger. 



1. Type, stuffed. Niger. Mr. J. T. Dalton (C). 



42. SYNODONTIS GRESHOFFI. 



Schilthnis, Tijdschr. Nederl. Dierk. Ver. (2) iii. 1891, p. 87 ; Bouleng. Poiss. Bass. 



Congo, p. 316 (1901). 

 Synodontis afro-fischeri (non Hilgend.), Vaill. N. Arch. Mus. (3) viii. 1896, p. 152, 



pi. xiv. fig. 2. 



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



