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Show 1902.] FISHES FROM THE NIGER DELTA. 329 nostril and eye ; 4 or 5 series of scales on the cheek; large scales on the opercle. Gill-rakers short and broad, 14 or 15 on lower part of anterior arch. Dorsal X V I -X V I I 9-11 ; spines increasing in length to the last, which measures \ length of head; median soft rays more or less produced, f to ^ length of head. Anal III 7, third spine a little shorter than the last dorsal, median soft rays produced like the dorsals. Pectoral about J length of head, not reaching origin of anal. Caudal rounded. Caudal peduncle as long as deep or a little deeper than long. Scales not ciliated, 28-29 2%. ; lat. 1. 20-2'> Dark oli• ve-brown above, yellowi•sh beneath ; a black opercular spot, followed by a rather indistinct dark band, extending to the root of the caudal; fins dark grey, spinous dorsal sometimes with a series of round black spots near the base. Total length 135 millim. Three specimens from Sapelle and one from Ossomari. I have much pleasure in naming this fish after Dr. Pellegrin, of the Paris Museum, who is at present engaged on a monograph of the Cichlida?, and who has pointed out to me the specific distinctness of this Pelmatochromis from P. guentheri Sauv., to which I had first referred it. The latter differs in the shorter posterior dorsal spines and the more truncate caudal fin. 49. T ilapia nilotica L.- Abo. 50. T il a p ia g a l il .e a Hasselq.- Agberi, Abo. P leu r o n ec t id ^e . 51. Citharichthys spilopterus Gthr .- Degama. 52. C ynoglossus senegalensis Kaup.-Degama. GOBIIDvE. 53. Gobius nigri G th r .- Degama. 54. G o bius sc i il e g e l i i Gthr.-Agberi, Degama, 55. G obius g u in e en s is Peters.- Agberi, Assay, Abo. G. ceneofuscus, var. guineensis Peters, Mon. Berl. Ac. 1876, p. 248. This is a smaller fish than the East-African G. ceneofuscus, growing to a length of 75 millim. only. The interorbital space is narrower. Recorded from the Cameroon River by Peters; obtained by Miss Kingsley at Kondo-Kondo, Ogowe ; by Mr. G. L. Bates in the Benito River, Gaboon. M a s t a c em b e lh l e . 56. M asta c em b e lu s lo e n n b e r g i i Blgr. (Plate XXIX. fig. 3.) -Agberi, Abo, Oguta, Gregani. |