PLATK XLVI— ConUnueU. 



Fenestella verrucosa. 



Page 110. 

 Fig'. a2. An enlai-gement from the noii-cellulifei-ous face of a fiviid, showing in-egular branches. 

 Fig. 23. An enlargement fi-oni the cellulifei'oiis face of a froml, showinjf the ilisposition of the Ct II aper- 

 tures, and the noiles alon^i: the mitlille of the branch. (X 0.) 

 V\);. '24. An enlargement of a tranKverse section of the branches. (X ti.) 

 Uj)j)er UeUlerbei-g group. jFVi//.« of the. Oh'ut rhx-r. 



Fenestella tl bekcllata. 



Pace 116. 

 Fig. 25. A fragment, natural size. 



Fig. 2<J. An enlargement fii)m the |)rece<ling, showing moi-e distinctly the form and disposition of the 

 branches anil dis-sepiment.-*, and the prominent nodes. (X 6.) See tigs. 33, 34. 

 UpiMjr Uelderberg group. IValpole, Oittario, Canada. 



Fenestella iEQUALis. 



Page 11-2. 

 Fig. 27. An enlargement from the non-celluliferous face. (X 6.) 

 Fig. 28. An enlargement from a .^iiecimen which ha.s tlie cellulifei-ou-s portion of the branches covered by 



a i-ock. deposit ; the carina, with prominent nodes alone being exposed. (X t>-) 'I 



Fig. 29. An enlargement of the lateral view of a bi-anch, showing the nodes on the non-celluliferous face. 



(X6.) 

 Fig. 30. An enlargement fi-om the celluliferous face ; the branch on the right has been macerated and the 



organic matter removed, K-aving the siliceous tilling of the cavity of the branch and of the cell 



tubes. (X ti.) 

 Fig. 31. An enlargement fn>m the non-cellulifenius face, the branches being partially imbedded in the 



i-ock. The branches are straight, sinuous or zig-zag, according to the i)08ition of the dissepi- 



mentti, whethei' alternating or opposite. (X 6.) 



Upper Helderberg group. F'alls oftlie Ohio river. 



Fen estella t u he itc u lata . 



Page 116. 

 Fig. 33. An enlargement of a lateral view of a branch. (X 6.) 



Fig. 34. An enlargement from the non-celluliferous face, showing striated branches and prominent nodes. 

 (X 6.) See figs. 25. 26. 



Upper Helderberg group. Wodpole, Ontario, Canada. 



Fenestella i'koceuitas. 



Page lis. 

 Fig. 32. A fragment, natural size. 



Kg. 35. An enlargement fi-om the non-celluliferous face. (X 6.) 

 Fig. 36. An enlargement from the celluliferous face. (X 6.) 



Upi)er Helderberg group. Walpole, Ontario,- Canada. 



