Haseman; Expedition to Centraf, South Amkkica. 317 



Cki'Hai.osii,i;ki!s, gcMi. no\-. 

 Head large, not as flattened as in Lophiosiliirns; lower jaw slightly 

 protruding; dorsal and adipose fins well dexelo'ped and high; occi])ital 

 crest not exposed as a triangular shield, with a narrow bony stay to the 

 base of the dorsal; otherwise like Lophiosiliirus. 



Cephalosilurus fowleri sp. nov. 



(IMate XL\"I.) 



Type (uni(iue). — No. 2880. 310 mm.- Cidade da Barra, Bahia, 

 Rio Sao Francisco, F'eb. 25, 1907. 



Locally known as Pocoma. Larger, more slender, and less com- 

 pressed than Lophiosilurus alexandriSte.\nd2t.c\\'aG:r. The lower jaw does 

 n(U jirotrude so much and the barbels are twice as long. The dorsal 



Fig. I. Cephalosilurus fowleri. 



and adipose fins are twice as high and without triangular bony ridges 

 on the head, as in Lophiosilurus alexandri. D. L 6; A. 8; P. L 6; head 

 3.16 in the length of the body, longer than broad; depth at the 

 origin of the dorsal 5.5 in the length; longest dorsal rays one-half as 

 long as the head; pectoral spine two-thirds the length of the head, both 

 margins with teeth; eyes small without distinctly free margins; mouth 



' The measurements of length given in the te.xt are to base of caudal. On plates 

 the full length is generally given. 



