PLATE 56 



Dalmanites sp. 

 Page 209. 



Fig. 1. A portion of a pygidium — partially exfoliated, 



Dalmanites carlwegi n. sp. 

 Page 209. 



Fig. 2. An incomplete pygidium. 



Dalmanites carlwegi n. sp. (?) 

 Page 209. 

 Fig. 3. A part of a pygidium. 

 Fig. 4. An incomplete pygidium. 



Phacops huds onions Hall 

 Page 210. 



Figs. 5, 6. Top and side views of a partially exfoliated portion of a cephalon. 

 Fig. 7. A part of a cephalon — the eye has an elevation of 3 ranges of lenses. 

 Figs. 8, 9. Top and side views of a portion of a cephalon. 

 Fig 10. An almost wholly exfoliated, incomplete cephalon. 



Phacops hudsonicus Hall (?) 

 Page 210. 



Fig. 11. An incomplete pygidium. 



Figs. 12, 13. Pygidia. 



Figs. 14, 15. Parts of cephala. 



Phacops logani Hall 



Page 211. 



Figs. 16, 17. Top and side views of the single, partially exfoliated, incomplete cephalon. 



