158 



Cincinnati Society of Natural History. 



or irregular patches. Cells small, mostly immersed, somewhat irregular 

 in their arrangement, with the rounded and slightly oblique apertures 

 raised conspicuously above the general surface. Cell apertures usually 

 about twice their own diameter distant from each other ; about eight 

 occupy the space of .1 inch. 



Formation and locality : Rare at Cincinnati, Ohio, near the tops of 

 the hills ; more abundant in the upper half of the Cincinnati Group. 



Berenicea vesiculosa, n. sp. (Plate VI., fig. 5.) 



Zoarium adnate, very delicate, growing usually upon smooth crinoid 

 columns. Cells showing distinctly upon the surface as elliptical convex 

 spaces, with the circular aperture situated upon the forward slope of the 

 same. The cells are closely arranged in rather irregularly alternating 

 series; measured along the length of the cells, about eight may be 

 counted in the space of .1 inch; and across their width eleven or twelve 

 occupy the same space. 



From the preceding species B. vesiculosa, is readily distinguished 

 by its less immersed, and more closely arranged cells. 



Formation and locality: Rare at Cincinnati, Ohio, from low-water 

 mark in the Ohio river, to 200 feet above that horizon. 



Scenellopora radiata, nov. gen. et sp. (Plate VI., figs. 6, 6a, and 66.) 

 Scenellopora, gen. char., ante p. 150. 



Zoarium depressed, conical in form, with the cell apertures occupy- 

 ing only the base of the cone; the sides are lined with a thin and 

 striated epitheca. The celluliferous surface is slightly concave, and 

 in the example before me, the central portion is smooth and without 

 cell-apertures. Radiating from this space to the outer margin are 

 about twenty rather unequal ridges, which carry either a single or 

 double row of cell -apertures; cells elliptical, oblique, about five in the 

 space of .1 inch, measured along the length of the ridges. The inter- 

 vening spaces like the central space appear to be solid. That is, 

 however, scarcely probable, and I believe that they were occupied by 

 interstitial cells, the mouths of which are closed b} r an interstitial 

 membrane. Height of zoarium, .15 inch; diameter of celluliferous 

 surface, about A inch. 



Scenellopora is nearly allied to some of the species of Aspendesia^ 

 Lamx., and consequently must be referred to the family Theonoida?, 

 Busk. 



Formation and locality: The specimen upon which this species 



