PLATE 32 



Chonetes coronatus (Conrad) 

 Page 138. 



Fig. 1. Brachial valve of an ordinary specimen. 

 Figs. 2 and 3. Pedicle valves of large specimens. 



(St. Laurent limestone) (W. M.* 23996 and 23976). 



Chonetes vicinus (.Castelnau) 

 Page 140. 



Fig. 4. An imperfect interior mould of the pedicle valve. 

 Fig. 5. An average brachial valve. 



(Beauvais sandstone) (W. M. 23995). 



Schuchertella chemimgensis pectinacea (Hall) 

 Page 137. 



Fig. 6. Internal mould of a brachial valve. 

 Fig. 7. Exterior of a brachial valve. 



(Grand Tower limestone) (W. M. 23879). 



Chonetes scitulus Hall 

 Page 139. 



Figs. 8 and 9. Pedicle and brachial views. (After Hall.) 



Stropheodonta patersoni Hall 

 Page 135. 



Fig. 10. A small area near an umbone to show peculiar ornamentation. (X2). 



(Grand Tower limestone) (University of Missouri collection). 

 Fig. 11. A pedicle valve. (After Hall.) 



Stropheodonta concava Hall 

 Page 134. 

 Fig. 12. A pedicle valve. (After Hall.) 



*W. M. indicates Walker Museum. 



