SYNODONTIS. 361 



must be borne in mind that his stuffed specimen is not in a quite satisfactory condition. 

 The most serious discrepancy lies in the size of the eye, which is stated to measure 

 18 millim. in diameter, the fish measuring 290 ; but this is contradicted by the figure 

 accompanying the description; probably " diametre de l'orbite " should stand instead 

 of " diametre de l'ceil." 



3. SYNODONTIS CAUDOVITTATIJS. 



(Plate LXVI.) 



Boulenger, Ann. & Mag. N. H. (7) viii. 1901, p. 10. 



Body moderately compressed, its depth three to three and a half times in the total 

 length, the length of the head three and one-third to three and two-thirds times. Head 

 a little longer than broad, as deep as broad, rugose, granulate above from between the 

 eyes ; frontal fontanelle rather narrow ; snout rounded, as long as or slightly longer 

 than the postocular part of the head ; eye supero-lateral, its diameter four and one- 

 third to five times in the length of the head, twice to twice and a half in the width 

 of the interorbital region, which is slightly convex ; occiput simply convex. Lips 

 moderately developed ; prsemaxillary teeth forming a short broad band ; movable 

 mandibular teeth not half the diameter of the eye, 33 to 38 in number. Maxillary 

 barbel without or with a mere rudiment of a marginal membrane, once and one-fifth, 

 to once and a half as long as the head, reaching the middle or the posterior fourth of 

 the pectoral spine ; outer mandibular barbel inserted a little further back than and 

 twice or a little more than twice as long as the inner, the former with long slender 

 branches, the latter with tubercular ramifications. Occipito-nuchal shield granulate 

 like the occiput, obtusely tectiform, with pointed or truncated posterior processes. 

 Humeral process flat, granulate, a little longer than broad, sharply pointed, extending 

 as far back as the occipito-nuchal process, or not quite so far. Skin smooth, without 

 villosities. Dorsal fin with I 7 rays, the spine strong, feebly curved, as long as or a 

 little shorter than the head, smooth or very finely serrated in front, feebly serrated 

 behind, with short or rather long filamentous prolongation. Adipose fin three to 

 four times as long as deep, three and a half to five times as long as its distance from 

 the rayed dorsal. Anal fin rounded, with 12 rays, 8 of which are branched. Pectoral 

 spine as long as or a little shorter than the head, feebly but distinctly serrated on the 

 outer edge, very strongly (15 to 24 seme) on the inner edge, reaching or nearly 

 reaching the ventral fin. Latter rounded, extending to or slightly beyond the origin 

 of the anal. Caudal fin deeply forked, upper lobe the longer. Caudal peduncle 

 deeper than long. 



Grey, tinged with olive on the head and back ; fins dark, except the spines and 



3a 



