from the Ogowe River and Old Calabar. 271 



body, and especially the young differs much from that of the 

 Nilotic species. 



D. ^- 7 . A. £=g. L. lat. 25. L. transv. 2*/9. 



The depth of the body is scarcely less than one half of the 

 total length (without caudal), the length of the head a little 

 less than one third. The snout is nearly equal to the diameter 

 of the eye, which is two ninths of the length of the head ; 

 interorbital space rather convex, wider than the orbit. Mouth 

 narrow, the maxillary extending somewhat beyond the front 

 margin of the orbit. Vomerine teeth ; palatine teeth in a very 

 narrow linear band. A series of short spinous teeth above 

 and below the opercular notch ; subopercular and part of the 

 interopercular margin finely and equally serrated. Tail very 

 short, the anal terminating immediately before, or subcon- 

 tinuous with, the caudal. Pores on the head entirely covered 

 by scales. Five or six rows of scales on the cheek, the 

 scales near the eye being much smaller than the others. 

 Ventral fins not prolonged, reaching the vent. Soft parts of 

 the vertical fins scaly. Blackish, a diffuse large black spot 

 on the end of the tail, in front of the root of the caudal. 



This diagnosis is taken from an adult specimen 150 millim. 

 long ; two young ones, 60 millim. long, differ in the following 

 points : — 



Their body is somewhat less elevated (though much more 

 than in young Ct. Petherici), its depth being contained 2-£ 

 times in the total length (without caudal). Interorbital space 

 as wide as the diameter of the eye, which is one fourth of the 

 length of the head. Two or three spines above and one 

 below the opercular notch ; suboperculum partly and indis- 

 tinctly, interoperculum not serrated. Vomerine teeth deve- 

 loped, only traces of palatine teeth in front of the bone. 

 Coloration as in the adult. 



All three specimens from Kondo-Kondo. 



Chromis latus, Gthr. 



Warri. 



The typical specimen was most likely from the same 

 locality, the late Mr. Fraser being known to have collected in, 

 or to have received collections from, the Niger delta. 



Chromis ogowensis, sp. n. 



? Chromis microcephalus, Sauvage, Bull. Soc. Zool. France, ix. 1884, 

 p. 196 (nee Bleek.). 



D. If. A. |. P. 13. L. lat. 27. L. transv. 3/11. 



Scales on the cheek in three series. Twenty-eight notched 



