298 



D. I. 7; A. 23; P. I. 10; V. 6. 



Elongate. Height below dorsal spine 4 3 / 5 5, head 3 2 / 5 , 

 width of head I 3 / 10 in its length, its dorsal profile sloping 

 down in a straight line to the rounded, flattened, prominent 

 snout which goes more than 2'/ 2 times in head. Upper jaw 

 projecting in such a way, that the larger part of the band of its 

 teeth is not covered by the lower jaw. Mouth slightly rounded, 

 nearly equal to postorbital part of head. Lips thickened where 

 they meet. Headshield posteriorly striped and roughly but 

 scarcely granulated ; occipital process keeled, granulated, about 



twice as long as broad in its middle, 

 its borders slightly concave and con- 

 verging, hindborder deeply emargi- 

 nate, touching the narrow crescentic 

 basal bone of dorsal spind! Median 

 fontanel shallow but broad, anteriorly 

 bordered by two parallel ridges, poste- 

 riorly by two converging ridges, which 



Fig. 122. Arius stirlingi Ogilby. About nat. size. 



are continued at their meeting point in the median crest of 

 the occipital process. Humeral process a short but sharply 

 pointed, smooth triangle. Eye / 3 / 5 8 '/ 5 , with the orbital margin 

 quite incompletetely free, slightly directed upwards, about 

 thrice in the slightly concave interorbital space, which goes 

 2 l / 2 2 4 / 5 in head. Maxillary barbels extending on to ven- 

 trals or at least to end of pectorals, mandibulary barbels 

 to middle of pectorals, mental barbels to posterior border of 



