174 CALIFORNIA ACADEMY OF SCIENCES. 



distinct from clarias, and more closely related to inacu- 

 latus than to clarias. 



The piscatrix Cope, and inacrospila Giinther, should 

 also be referred to this species. 



The Mystiis No. 84- Gronow was referred successively 

 by Valenciennes to clarias, by Giinther to inaculatus, 

 and by Bleeker to macronerjia. 



GENERAL DESCRIPTION. 



Body robust, especially in older specimens; head coni- 

 cal, its greatest depth 2, its greatest width 1^ in its length; 

 the ossification of the head exposed, granular; occipital 

 process arched transversely, its width at the base f its 

 length. 



Maxillary barbel, terete extending beyond the tips of 

 the dorsal; mental and postmental barbels almost equi- 

 distant from each other, the mentals about reaching to 

 the pectoral; the postmentals beyond the middle of the 

 pectorals. 



Mouth moderate, its width at the angles 2| to 3 J in 

 the length of the head; the lower jaw is included, the 

 upper bordered by a broad lip. 



Teeth in lower jaw in bands which taper to a point 

 behind the rictus, interrupted in the middle; teeth of 

 the upper jaw in a narrow uninterrupted band; some- 

 times minute patches of teeth on the vomer, some- 

 times larger patches on the pterygoid bones. 



Gill-membranes separate to in front of eye; gill-rakers 

 6+19. 



Adipose dorsal short, 3 J to 5o- in the length. 



Caudal divided to near its base. 



Anal emarginate, the fourth ray highest, extending 

 beyond the tip of the last ray. 



Ventrals short and broad, extending h of their length 

 bevond the vent. 



