12. Hgr. 



13. Skel. 

 14-15. Ad. 

 16. Ad. 

 17-19. Types of 



C. dolloi. 



20. Ad. 



21. Yg. 



22. Her. 



Leopoldville. 



L. Leopold II., Upp. Congo. 

 Bikoro, L. Tumba, „ 

 Monsembe, „ 



Upper Congo. 



Lindi R., Upp. Congo. 



Banzyville, Ubanghi. 



R. B. N. Walker, Esq. (C). 



Dr. W. J. Ansorge (C). 

 M. P. Delhez (C). 

 M. A. GreshofF (C.) j 



Utrecht Museum (E.). 

 Drs. Dutton, Christy, and 



Todd (C). 

 M. P. Delhez (C). 



Rev. J. H. Weeks (P.). 



Brussels University. 

 M. M. Storms (C.) ; 



Brussels Museum (P.). 

 Capt. Royaux (C). 



21. CLARIAS BYTHIPOGON. 

 Clarias luthupogon, Sauv. Bull. Soc. Philom. (7) iii. 1878, p. 96 ; Giinth. Ann. & 



Mag. N. H. (6) xvii. 1896, p. 275 ; Bouleng. Poiss. Bass. Congo, p. 261 



(1901), and Proc. Zool. Soc. 1907, p. 1082. 

 Clarias gabonensis (non Giinth.), Sauv. N. Arch. Mus. (2) iii. 1880, p. 39, pi. i. 



Clarias camerunensis, Lonnb. Overs. Vet.-Ak. Forh. Stockh. 1895, p. 192. 



Depth of body 6 to 7 times in total length, length of head 4 to 4J 

 times. Head 1J to 1^ times as long as broad, smooth above, or very 

 finely granulate behind ; occipital process angular ; frontal fontanelle 

 small, sole-shaped ; occipital fontanelle smaller, partly on the occipital 

 process ; eye small, its diameter 2\ times in length of snout, 4 or 5 

 times in interorbital width, which nearly equals width of mouth and 

 is contained twice in length of head; band of preem axillary teeth 4 to 

 5 times as long as broad ; vomerine teeth conical, forming a crescentic 

 band which is as broad as or narrower than the pnemaxillary band ; 

 nasal barbel as long as or a little longer than head ; maxillary barbel 



2 to 1\ times as long as head, reaching beyond base of ventral ; inner 



mandibular barbel at least as long as head, about § length of outer. 



17-22 gill-rakers on anterior arch. Clavicles concealed under the skin. 



Dorsal 78-87, its distance from occipital process f or ^ length of head, 



