Plate XLV Continued. 



PAGE. 



5 b, Surface of 5 a, x!2, showing the irregular zooecia and large acuntho- 



pores. 

 5 c. Vertical section of N. Y. form, x!8. Shows the tubular zooecia, strong 



acanthopores, and the epithecal lining of the interior of the branches. 



5 d. Tangential section of N. Y. form, showing acanthopores and the gradual 



thickening of the walls toward the surface, x!8. 



Fig. 6. MONTTCULIPOKA WINCHELLI Ulr 408 



6. Tangential section, xlS, showing one of the group of large cells, and the 

 small passage left by the cystiphragms. 



6 a. Vertical section, x!8, i-howing the closely arranged cystiphragms. In 



most of the tubes they present the appearance of ordinary diaphragm*. 

 Hamil'on group, Thunder Bay, Mich. 

 Prof. A. H. Wortheu's collection. 









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