250 



SILURIDiE. 



24. CLARIAS MACROMYSTAX. 

 Gunth. Cat. Fish. v. p. 17 (1864) ; Bouleno-. Proc. Zool. Soc. 1907, p. 1084, fig. 

 Depth of body 6J times in total length, length of head 4 times. 

 Head 1^ as long as broad, finely granulate above; occipital process 

 angular ; frontal fontanelle oval, not quite twice as long as broad ; 

 occipital fontanelle smaller, in advance of occipital process ; eye small, 

 its diameter 3 times in length of snout, 5J times in interorbital 

 width, which equals width of mouth and f length of head ; band of 

 pnemaxillary teeth only 3 times as long as broad ;* vomerine teeth 



Fiff. 212. 



Clarias viacromi/st((x. 

 Type (P. Z. S. 1907). 



f mostly granular, forming a large ian-shaped patch the 



longitudinal diameter of which exceeds the width of the 

 preemnxillary band; nasal barbel as long as head ; maxillary barbel 1 g- 

 len^th of head, reaching nearly to base of ventral ; inner mandibular 

 barbel nearly as long as nasal, | length of outer. Gill-rakers on 

 first arch not closely set, 16 in number. Clavicles exposed, striated. 

 Dorsal 80, its distance from occipital process ^ length of head, very 

 narrowly separated from caudal. Anal 63, very narrowly separated 

 from caudal. Pectoral J length of head, the spine strongly serrated 



