SEA-FISHERIES LABORATORY. 303 



The largest of these spinulated scales are found 

 along the lateral line; they are about 3 mm. in diameter — 

 a single scale is represented in fig. 11. On the anterior 

 margin is a depression, and from this, as a centre, are 

 several radiating rows of spines. The scale is very thick ; 

 ground sections shew that it is composed of dense bone 

 without obvious vascular channels, but with lacunae and 

 canaliculae. Between the rows of spines it is covered 

 with a thin pigmented epidermis. 



