APPENDIX C. 
221 
Heterobranclms longifilis, C. & Y. 
B. 9— 10. D. 29— 31. A. 44— 46. P.1/10. 
The adipose fin commences immediately behind the dorsal and 
terminates at the root of the caudal ; its length is equal to^ or not 
much less than, that of the rayed dorsal ; pectoral spine distinctly 
serrated. The length of the anal fin is nearly one-third of the total 
(without caudal) . The nasal barbels extend to the base of the occi- 
pital process, those of the maxillaries to the root of the ventral fin ; 
but they appear to be rather shorter in large specimens. Vomerine 
teeth villiform, forming an arched band which is as broad as that 
of the interm axillaries. Blackish above, whitish below. 
ScHiLBE. {Schilbe.) 
Body scaleless, elongate. One short dorsal fin with a pungent 
spine; no adipose fin; the anal terminates close by the caudal^ 
which is forked. Barbels eight : one to each maxillary, one to each 
posterior nostril, and two to each mandible, the latter being placed 
one behind the other. The palatine teeth are present, and form, 
together with those of the vomer, a horseshoe-like band. Nostrils 
remote from each other, the posterior wider than the anterior. 
Head covered with skin. Neck elevated, the upper profile of the 
head being concave ; eye behind and partly below the cleft of the 
mouth. Ventral composed of six or seven rays, behind the pectorals. 
