PLATE XXIX. 

 Fig. 1. Ph^nopora bxpansa Hall and Whitfield 598 



/ A frond parted along the epithecal membrane. S. H. O 



Fig.. 2. Ph^nopora magna Hall and Whitfield 599 



Fronds parted along the epithecal membrane. S. H. O, 



Fig. 3. Ph^nopOra muMCIfida (VanCleve) Hall 599 



■ A frond parted along the epithecal membrane, collection of Geo. Caswell. S. H. O. 

 Fig. 4. Homotrypa confi,uens Foerste 600 



a, Branch of usual size, b, Gnarl formed by coalescence of several branches. 

 S. H. O. 

 Fig. 5. Cau,opora magnopora Foerste 600 



A branch starting to divide or branch at the top. C. O. 

 Fig. 6. Lioclemeli,a ohioensis Foerste 600 



Two branches of quite large size for this species. C. O. 



