fontanelle is elongate, slightly encroaching upon the base of the triangular process, The length of the head (measured to the end of the process) is two-ninths of the total (without caudal); the width of the interorbital space is one-half of the length of the head. Barbels moderately long, that of the nostril not reaching the gill-opening, and that of the maxillary extending to the origin of the dorsal fin, which is opposite to the end of the pectoral. Anal fin not low. Vertical fins separated from each other by a small interspace. Coloration uniform blackish brown.
| millim. | |
| Total length | 171 |
| Total„ length„ without caudal | 150 |
| Length of upperside of the head | 35 |
| Width of interorbital space | 18 |
| Diameter of the eye | 2'7 |
Ogowé River.
Clarias gabonensis.
- Clarias gabonensis, Günth, Ann, & Mag. Nat. Hist. 1867, xx. p. 110.
D. 76-78.A. 56-60.P. 1/10.
Vomerine teeth villiform, forming a band which is a little broader than the intermaxillary band, without posterior projection; each half of the intermaxillary band is twice as wide as it is broad, and laterally scarcely extends so far as the vomerine band. Head naked above, finely granular and striated. The occipital process triangular, with rounded end, its base being a little longer than its sides, The fontanelle is ovate, and does not encroach upon the base of the triangular process. Length of the head one-fourth of the total (without caudal); snout contracted, the width of the interorbital space being less than one-half of the length of the head. Barbels moderately long, that of the nostril reaching to the root of the pectoral fin and that of the maxillary to the origin of the dorsal, which is nearly opposite to the end of the pectoral. Anal fin not low. Vertical fins separated from each other by a small interspace. Coloration uniform blackish brown.
| millim. | |
| Total length | 168 |
| Total„ length„ without caudal | 148 |
| Length of upperside of the head | 38 |
| Width of interorbital space | 15 |
| Diameter of the eye | 3 |
