226 SILURIDiE. 



2. Head lf-lj times as long as broad. 

 Length of head 4; l ,-5j times in total, 3 times 



its distance from dorsal; distance between 



ventrals and caudal 1J that between 



ventrals and end of snout ; maxillary 



barbel as long as or a little longer than 



head ; D. 80-90, A. 67-73 ; 14 gill- 

 rakers on anterior arch ; pectoral spine 



feebby serrated on outer side .... 31. C. theodorce, M. Web., p. 262. 

 Length of head 5 times in total, 3 times its 



distance from dorsal ; distance between 



ventrals and caudal If that between ven- 

 trals and end of snout ; auxiliary barbel 



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



20 gill-rakers on anterior arch ; pectoral 



spine not serrated on outer side . . . 32. C. fouloni, Blgr,, p. 263. 

 Length of head 5-6 times in total, 1-j-lf its 



distance from dorsal ; distance between 



ventrals and caudal 1| that between ven- 

 trals 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 33. C. sake, Hubr., p. 264. 



1. CLARIAS ANGUILLARIS. 



Silurus anguillaris, Linn, in Hasselq. Reise Palast. p. 415 (1762), and Syst. Nat. 



i. p. 502 (1766). 

 Macropteronotus char mirth, part., Lacep. Hist. Poiss. v. p. 85 (1803). 

 Macropteronotus anguillaris, part., Riipp. Beschr. n. Fische Nil, p. 5 (1829). 

 Clarias hasselquistii, Guv. & Val. Hist. Poiss. xv. p. 362, pi. ccccxlvi. (1840). 

 Clarias anguillaris, Giinth. Oat. Fish. v. p. 14 (1864) ; Peters, Reise Mossamb. 



iv. p. 36 (1868) ; Giinth. Petherick's Trav. ii. p. 217 (1869) ; Panceri, Rend. 



Ace. Sc, Soc. R. Nap. xii. 1873, p. 110 ; Bouleng. Fish. Nile, p. 280, 



pi. xlix. (1907), and Proc. Zool. Soc. 1907, p. 1068. 

 Clarias parvimanus, Giinth. opp. cit. pp. 15, 218. 



Depth of body 5-j to 7f times in total length, length of head 3 to of 

 times. Head 1^ to If 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 fontanelle small, 

 in advance of occipital process ; eye 2 (very young) to 4-£ times in 



