from the Ogowe River and Old Calabar. 269 



II. Anal and caudal fins nearly continuous. 



. -p. 15-17(18) .10(9) r. ,, e , , 



A. D. 7 _ l0 . A. g^j|. Depth of body 



f of length in adult, 4- in young 6. Petherici, Gthr. 



B. D. !5=!I. A. g? Depth of body 4. of 



length in adult, f in young 7. Kingsleytv, Gthr. 



Ctenopoma gabonense, sp. n. (PL XIII. fig. C.) 



Ctenopoma multispine, var., Giinth. Ann. & Mag. Nat. Hist. 1867, xx. 

 p. 110. 



D. ^. A. ~. L. lat. 32. L. transv. 2|/9. 



Body almost as oblong as in Ct. multispine, to which this 

 species is closely allied. The height of the body is two 

 sevenths, or less than one third, of the total length (without 

 caudal), the length of the head two sevenths or rather more 

 than two sevenths. The snout equals the diameter of the 

 eye, which is one fifth of the length of the head ; interorbital 

 space nearly flat, much wider than the orbit. Mouth mode- 

 rately wide, the maxillary not extending beyond the vertical 

 from the centre of the eye. The entire margin of the sub- 

 operculum is armed with prominent spines ; also part of the 

 interopercular margin is spiny. The space between anal and 

 caudal fins is equal to, or even longer than, the diameter of 

 the eye. Ventral fin not reaching the vent. Pores on the 

 head rather small, inconspicuous. Coloration uniform. 



Of this species there are two specimens in the British 

 Museum, 140 and 153 millim. long, both from the Gaboon. 

 One was obtained by the late Mr. K. B. N. Walker, and 

 therefore most probably came from the Ogowe River. Both 

 have twenty dorsal spines, which number does not seem to 

 have been ever observed in Ct. multispine ; from the latter 

 species the present differs besides in a rather smaller mouth and 

 much stronger subopercular armature. Vomerine and pala- 

 tine teeth present. 



Ctenopoma nanum, sp. n. (PI. XIII. fig. B.) 

 D. ^. A. 9^5. L. lat. 27. L. transv. 2^/9. 



Body stouter than in Ct. multispine or Ct. gabonense, its 

 greatest depth being contained 2| in the total length (without 

 caudal) and nearly equal to the length of the head. The 

 snout equals the diameter of the eye, which is contained 4| in 

 the length of the head ; interorbital space rather convex, not 

 wider than the orbit. Mouth rather narrow, the maxillary 

 not extending to the vertical from the centre of the eye. 



