1068 MB. G. A. BOULBNGER ON [DeC. 10, 



h. Length of head 4|-5i times in total; D. 78-87, A. 68-80; 15-20 gill- 

 rakers on anterior arch. 

 Head If-li as long as broad; nasal barbel |-| 



length of head 26. C. ^acliynemaBlgv. 



Head 1^-1 5- as long as broad; nasal barbel f-f 

 length of head 27. C.lcBvicejps QiW. 



C. Dorsal and anal embracing and adnate to base of candal ; maxillary bari:-el 

 ■|-1| length of head. 



1. Head l^lj as long as broad. 



Length of head 4 times in total ; ventrals a little 



nearer end of snout than caudal ; D. 55, A. 50 ; 



pectoral spine not serrated on outer side 28. C. hwettikoferi ^t&e. 



Length of head 5 times in total ; distance between 



ventrals and caudal 1| that between ventrals and 



end of snout ; I). 80, A. 65 ; 15 gill-rakers on 



anterior arch ; pectoral spine serrated on both 



sides 29. C.amplexicauda^lgv. 



2. Head If to \\ as long as broad. 



Length of head 4|-5i times in total, 3 times its 

 distance from dorsal ; distance between ventrals 

 and caudal 1^ that between ventrals and end of 

 snout ; maxillarj' barbel as long as or a little longer 

 than head; D. 80-90, A. 67-73; 12 gill-rakers "on 

 anterior arch ; pectoral spine not serrated on outer 



30. C. tlieodorce M. Web. 



Length of head 5 times in total, 3 times its distance 

 from dorsal ; distance between ventrals and caudal 

 If that between ventrals and end of snout ; maxil- 

 lary barbel a little shorter than head ; D. 83, A. 68 ; » 

 20 gill-rakers on anterior arch; pectoral spine 

 not serrated on outer side 31. CfouloniUlgv. 



Length of head 5-6 times in total, l^-lf its distance 

 from dorsal ; distance between ventrals and caudal 

 If that between ventrals and end of snout ; 

 maxillary barbel a little longer than head ; 

 D. 89-93, A. 70-78 ; 8-10 gill-rakers on anterior 

 arch; pectoral spine serrated on outer side 32. C. sales Hubr. 



1. Olarias anguillaris. 



Silurus anguillaris Linnaeus, in Hasselquist, Reise Falsest. 

 p. 415 (1762), and Syst. Nat. i. p. 502 (1766). 



Macropteronotus char'muth, part., Lacepede, Hist. Poiss. v. 

 p. 85 (1803). 



MacTO]iteronotus anguillaris, part., Riippell, Beschr. n. Fische 

 Nil, p. 5 (1829). 



Clarias hasselquistii Cuvier & Valenciennes, Hist. Foiss. xv. 

 p. 362, pi. ccccxlvi. (1840). 



Clarias anguillaris Giinther, Oat. Fish. v. p. 14 (1864); Feters, 

 Reise Mossamb. iv. p. 36 (1868); Giinther, Fetherick's Trav. ii. 

 p. 217 (1869); Fanceri, Rend. Ace. Sc, Soc. R. Nap. xii. 1873, 

 p. 110 ; Boulenger, Fish. Nile, p. 280, pi. xlix. (1907). 

 Clarias jjarvimanus Giinther, opp. cit. pp. 15, 218. 



Depth of body 5^ to 7| times in total length, length of head 3 

 to 3f times. Head 1^ to 1| times as long as broad, its upper 

 surface coarsely granulate in the adult ; occipital process angular ; 

 frontal fontanelle elliptical, sole-shaped or knife-shaped, 3 to 5 

 times as long as broad, 3|- to 5 times in length of head ; occipital 



