Ellis: The Plated Nematognaths. 413 



(5 in pectoralis)', origin of dorsal nearly equidistant from tip of snout 

 and spine of adipose fin (much nearer snout in pectoralis of equal 

 size), six or seven azygous plates in front of the adipose spine; caudal 

 emarginate; pectorals reaching to third or fourth plate beyond origin 

 of ventrals (to ventrals in pectoralis) ; distance between pectorals 

 considerably less than the length of the coracoids (equal to, or less 

 than, length of coracoids in pectoralis) ; coracoids in contact along the 

 median line, with a narrow V-shaped naked area between them 

 posteriorly, very heavy and overlapping in front in the male. Barbel 

 to middle of pectoral or a little further (to tip of ventrals in pectoralis). 

 Fontanel oval in young, circular in adult; occipital not reaching 

 fontanel by two-thirds to one and one-half diameters of the fontanel. 

 Slaty blue-black, but little lighter below. 



