PLATE XLII. 



Bronteus Ekwanensis (page 266). 



Figure 1. Exterior of the dorsal surface of an imperfect pygidium of a specimen of 

 this species, from the Ekwan River limestone, slightly restored. 



Bronteus aquilonaris (page 267). 



Figure 2. Similar view of a nearly perfect pygidium of a specimen of this species, 

 also from the Ekwan River. 



ACIDASPIS PERARMATA (page 289). 



Figure 3. Slightly restored outline of the entire dorsal surface of the type and only 

 known specimen of this species, from the Silurian limestone at Long 

 Point, Lake Winnipegosis. 

 From a drawing by Mr. L. M. Lambe. 



