382 APPENDIX A. 
7. SYNODONTIS GELEDENSIS, sp. n. 
Allied to S. serratus} 
General form of the body somewhat elongate; snout rather pro- 
duced, subconical; diameter of the orbit two sevenths of the length 
of the snout. The gill-opening extends downward to before the 
root of the pectoral fin. Mandibulary teeth in moderate number, 
shorter than the eye, in a very narrow band. The manillary barbels 
reach to the end of the humeral spine, and are lined with a narrow 
membrane interiorly. Mandibulary barbels reaching to the root 
of the pectoral, provided with numerous long fringes. Nuchal 
carapace tectiform, obtusely rounded behind, its end reaching to 
below the first soft dorsal ray. Humeral spine not quite extending 
so far backward, much longer than high, with its upper margin 
deeply excised, terminating in a sharp point. 
Adipose fin rather long, the interspace between it and the dor- 
sal being less than the base of the latter. Dorsal spine serrated 
anteriorly, shorter than the pectoral spine, which is strongly ser- 
rated along both edges and equal to the distance of the foremost 
part of the soft part of the trunk from the snout. Dorsal and 
pectoral spines and the caudal lobes produced into filaments. 
Coloration uniform. 
Dae il. theca: 
A single specimen, 30 cm. long, was obtained on Jan. 19, 1895, 
at Geledi on the Shebeli. 
This fish is closely allied to S. serratus, but sufficiently distin- 
guished by the different form and outline of the cephalic carapace. 
8. SYNODONTIS SCHAL, BI. Schn. 
As the specimen in the collection differs in some respects from 
the typical form, I give a description of it. 
Dir A125) Fo 
Rather stout in general habit; snout comparatively broad; 
diameter of the orbit two fifths of the length of the snout, and of 
the width of the interorbital space. The gill-opening extends 
downward to before the root of the pectoral fin. Mandibulary 
teeth in a very narrow and short row, less than 20 in number, 
shorter than the eye. The maxillary barbels do not reach the end 
of the humeral spine and are simple; mandibulary barbels reach- 
1 TI must again draw attention to an unfortunate clerical error in Cat. Fish. 
v. p. 212, where the line “ B. Mandibulary teeth no longer than the eye” ought 
to have been placed above “ Synodontis serratus.” 
