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PLATE X. 





PAOB. 

 ZAPHBENTIS CLIPFOKDANA? E. & H 75 



Fig. 1. Lateral view of a small specimen. 



Fig. 1 a. View of the calyx. 



Fig. 1 b. Lateral view of a larger specimen, 



ZAPHBENTIS CALCABIFOBMIS Hall 74 



Fig. 2. Lateral view of a very long specimen. 

 Fig. 2 a. View of the calyx. 



ZAPHBENTIS CAEINATA Worthen 75 



Fig. 3. Lateral view of a specimen. 

 Fig. 3 a. View of the calyx. 



ZAPHBENTIS LANCEOLATA Worthen 76 



Fig. 4. Lateral view of a specimen. 

 Fig. 4 a. View of the calyx. 



ZAPHBENTIS PABASITIOA Worthen 79 



Fig. 5. Lateral view of an attached specimen. 

 Fig. 5 a. View of the calyx. 



ZAPHBENTIS SPINUI.OSA E. & H 73 



Fig. 6. Lateral view of a specimen. 

 Fig. 6 a. View of the calyx. 



AMPLEXUS GENICULATUS Worthen 82 



Fig. 7. Lateral view of a large spe3imen. 

 Fig. 7 a. Same view of a smaller specimen. 



ZAPHKENTIS SPEKGENENSIS Worthen 77 



Fig. 8. Lateral view of a specimen. 

 Fig. 8 a. View of the calyx. 



ZAPHBENTIS VAKSOVIENSIS Worthen., 78 



Fig. 9. Lateral view of a specimen. 

 View of the calyx. 



ZAPHBENTIS ULBICHI Worthen 76 



Fig. 10. Lateral view of a specimen. 

 Fig. 10 a. View of the calyx. 



ZAPHBENTIS PELLENSIS Worthen 74 



Fig. 11. Literal view of a specimen. 

 Fig. 11 a, View of the calyx. 



