PLATE IX. 



ZAPHBENTIS CENTBALIS E. & H.. 

 Fig. 1. Lateral view of a specimen. 

 Fig. 1 a. View of the calyx. 

 Fig. 2. Ca3t in chert of a speolman from the Burlington limestone. 



ZAPHKENTIS CHESTEKENSIS Worthen 

 tig. 3. Lateral view of a specimen. 

 Fig. 8 a. View of the calyx. 



ZAPHKENTIS ILLINOIENSIS Worthen 



Fig. 4. Lateral view of a specimen. 77 



Fig. 4 a. View of the calyx. 



ZAPHKENTIS CYLINDKACEA Worthen... 

 ng. 5. Lateral view of a specimen. 

 Fig. 5 a. View of the calyx. 



ZAPHKENTIS PELBNSIS Worthen 

 tig. 6. Lateral view of a specimen. 

 Fig. 6 . View of the calyx. 



ANISOPHYLLUM? IOVENSE Worthen. . 



W*. 7. Lateral view of a specimen. 8 " 



Fig. 7 a. View of the calyx. 



