(^4 PROCEEDINGS <>F THE NATIONAL MUSEUM. 



Ccdlopora onealli communis (James). 



(See also Plate I, fig. 13.) 



Figs. 8 and 9. Two fragments of tills robust variety, X l.o. 



McMicken member of the Eden shale, Cincinnati, Ohio. 



Pl,ATK \'. 



]ilcr<iiio/K>r(i iiiecki (James). 



1. View of a portion of the surface of the slal) containing flie types of this 



species, X 6. The figure contains two simple and one bifurcated s< rnients 

 and exhil)its the elongate, narrow, subcylindi-ical form distinguish ng the 

 joints of this delicate bryozoan. 



Mt. Hope member of the Fairview formation, Cincinnati, Ohio. 



Mhinidictyd p<iraUelit (James). 

 (See also Plate II, figs. 5-7.) 



2. View of the type specimen of Ptilodicfi/a yranalosa James, X 6, showing the 



thickened granulose walls found in old examples. 



3. View of the type of Ptilodictijn parallela James, X 1-5. It is the central stipe 



in the figure and party covered by the free cheek of an Acidaqm. 

 Economy member of Eden shales, Cincinnati, Ohio. 



Bythopora pdrrula (James) . 

 (See also Plate III, figs. 11, 12.) 



4. Surface of slab bearing type specimens, X 1.5, showing several branches 



within the space outlined with ink. 



McMicken member of Eden shales, Loveland, Ohio. 



Hemiphragma wh itfieldi ( James ) . 

 (See also Plate II, figs. 15, Ki; plate IV, figs. 1-4.) 



5. Perfectly cleaned surface of specimen sliowing semidiaphragms witliiii 



zotecia, X 8. 



Southgate member of Eden shales, AVest Covington, Kentucky. 



Ceramoporella whitet (James). 

 (See also Plate VI, figs. 8-10. ) 



6. Surface of James's type, X 8, showing the nearly direct apertures and incon- 



spicuous lunaria, which features distinguish the species from the otherwise 

 similar C. oliioensis (Nicholson). 



Corryville member of the McMillan formation, Cincinnati, Ohio. 



Aspidopora ecceutnca (James). 

 (See also Plate II, figs. 8-12.) 



7. The underside of a specimen of this peculiai- spei-ies, X by 8, showing the 



eccentric striation of this surface. 



8. Upper, celluliferous surface of another example, X 8. 



Southgate member of Eden shales, Cincimiati, Ohio, 



