PLATE 31 

 Orthothetes t^Schuchertella) deformis Hall 



Page 124 



1-4 Views of ventral valves of this species 

 Locality. Edmunds Hill 



Leptostrophia magnifica Hall protype parva Clarke 



1 'age 123 



5-9 Exteriors and internal casts showing the prevailing habit of this 

 shell 

 Locality. Edmunds Hill. 



Dalmanella drevermanni Clarke 



Page 125 



10-12 Three views of the shell natural size 



14 Exterior of a dorsal valve, x 2 



15 Interior of a dorsal valve (figure 12). x 2 



Locality. Edmunds Hill 



Orthis sp. 



Page 125 



13 Internal cast of dorsal valve allied to O. personata Zeiler. x i*4 



Hipparionyx minor Clarke 



Page 124 



16 Cardinal view of a dorsal valve showing elevation of cardinal process 

 17, 18 Exteriors of ventral valves 



19, 20 Dorsal valves 



21 Interior of ventral valve 



22 Enlargement of surface sculpture, x 5 

 Locality. Edmunds Hill 



Orbiculoidea cf. ampla Hall and siegenensis Kayser 



Page 126 



23, 24 Locality. Presque Isle stream 



228 



