PLATE III. 



Fig. 1. — Plnnatopora ptiloj^oroidea Rogers. 



1. Reverse, X 10. 



Fig. 2. — Pinnatox)ora tnultipora Rogers. 



2. Speeimen, natural size. 

 2a. Horizontal section, X27. 



Fig. 3. — Septojjora interpoi-ala Rogers. 



3. Specimen, natural size. 



3a. Obverse, X27. (The apertures are a little too far apart.) 

 Fig. 4. — Acanthocladia pinnata Rogers. 



4. Specimen, natural size. 

 4a. Obverse, X 27. 



Fig. 5. — Cystodictya divisa Rogers. 



5. Specimen, natural size. 



5a. Transverse section of several hemibranches, X'^' 



56. Horizontal section, X 10- 



5e. Vertical section, X27. 



5c?. Non-poriferous surface of a hemibranch, X 27. 



