322 



SILUEID-E. 



Arius acutivelis, Cuv. & Yal. Hist. Poiss. xv. p. 85 (1840) *. 

 Melanodacti/lus niiji'od'Kjitatus, Bleek. Nederl. Tijdschr. Dierk. i. 1863, p. 05. 

 Chrt/sichthi/s nigrodhjitatus, Giinth. Cat. 'Fish. v. pp. 73 ct 430 (18G4); Steiiid. 



Ritzb. Ak. Wien, Lx. i. 1870, p. 989, pi. vii., and Notes Leyd. Mus. xvi. 1894, 



p. 59 ; Giinth. Proc. Zool. Soc. 1899, p. 727. 

 Chrysichthys macrops, part., Giinth. Ann. & Macr. N. H. (3) xx. 1867, p. 112. 

 Chryskhthys InUtikoferi, Steind. Notes Leyd. Mus. xvi. 1894, p. 60, pi. iii. tig. 1 ; 



Gunth. Ann. & Mag. N. H. (6) xvii. 1896, p. 276, and Proc. Zool. Soc. 1899, 



p. 721, pis. xli. & xlii. fig. A. 

 Chrysichthys oyowei^sis, Giinth. Proc. Zool. Soc. 1899, p. 723. 

 Chrysichthys corlscanus, Giinth. t. c. p. 724. 

 Chrysichthys lagoensis, Giinth. t. c. p. 725, and 1902, ii. p. 335, fig. 



Depth of body 4 to 5 times in total length, length of head 3^ to 3f 

 times. Head feebly depressed, l\ (young) to H times as long as broad, 



Fig. 253. 



Ch rysichthys niyrodiyifatus. 

 After Sfeindacbiier (Sitzb. Ak. Wien, 1870). 



its upper surface more or less rugose, the rugosities usually showing 

 under the thin skin; occipital process narrow, extending to the small 



* I have examined the types of A. aciUivel!s=md(inodactyhis (1(jO nu\Y\m., very had]y 

 preserved) and B. maums (195 niiUiin.) in the Paris Museum. In both the dentition of 

 the palate is reduced to two small groups of vomerine teeth. Larger specimens (220- 

 340 niillim.) from the Senegal (lleudelot) and Goree (Bang) have a small group of teeth 

 on each entopterygoid, widely separated from the vomerine. 



