Add 



7. MARCUSENIUS LONGIANALIS, Blgr. 



5, 6. Hgr. Niger Delta. Mr. J. Paul Arnold (P.). 



7. Ad. Kribi R. at Kribi, S. Cameroon. G. L. Bates, Esq. (C). 



8rt. MARCUS RNIUS CASTELNAUI. 

 Bouleng. Tr. Zool. Soe. xviii. 1911, p. 402, pi. xxxviii. fig. 1. 



Depth of body 3 times in total length, length of head 3f times. 

 Head as long as deep, twice as long as broad ; snout rounded, ^ length 

 of head, projecting very slightly beyond month ; mouth small, well 

 below level of lower border of eye ; teeth small, notched, 7 in upper 

 jaw, 8 in lower ; eye rather indistinctly defined, nearly as long as snout, 



riff. 106. 



Marcusenias castelnaui. 

 Type (Tr. Z. S. 1911). f . 



its diameter not ^ interocular width ; posterior nostril a little lower 

 down than upper, close to eye. Dorsal 17, originating above 4th ray of 

 anal, its length ^ its distance from head, upper border slightly convex 

 in front, longest ray f length of head. Anal 23, equally distant from 

 ba'^e of ventrals and from base of caudal. Pectoral pointed, a little 

 shorter than head, twice as long as ventral, extending to middle of 

 latter. Caudal with rather short rounded lobes. Caudal peduncle 

 2^ times as long as deep, a little shorter than head. 48-50 scales in 

 lateral line, 1^^ in transverse series on body, ^ in transverse series 

 between dorsal and anal, 12 round caudal peduncle. Pale brownish. 



