Explanation of Plate XXXII. 



Fig 1 . Illcenus insignis ? 227 



la. Dorsal aspect. (Rowley collection ) 

 lb. Portion of another ex an pie. (Mus. Mo Geol Sar ) 

 Silurian, Trenton limestOLe. 



Fig. 2. Cyphaspis girardeauensis '. 228 



Type. (After Shumard ) 

 Silurian, Girardeau limestone. 



Fig 3. Dalmanitcs tridentifera 229 



3a. Head of large specimen. (After Shumard ) 

 3b. Pygidium of smaller iLdividual. 

 Silurian. 



Fig 4. Acidaspis halli 230 



Pygidium. (After Shumard ) 

 Silurian, Girardeau limestone. 



Fig 5. Calymene niagarensis . 



Lateral view (Keyes collection ) 

 Silurian, Niagara limestone. 



Fig 6. PhiUipsia tuber culata 235 



Pygidimm. (Keyes collection ) 

 Caiboniferoue, Burlington limestone. 



Fig 7. PhiUipsia portlockii 236 



Djrsal aspect (Keyes collection ) 

 Carboniferous, K oisuk limt stone 



Fig 8 . PhiUipsia major 238 



8a Buckler of coiled tpecimen. (Hare collect ion ) 



8b. Pygidium of same. 



8c. Lateral aspect of same 



81. View of another example. (Same collection ) 



8e. Large individual. (Mus Kansas Univ ) 

 Carboniferous, Upper Coal Measures 



