Cincinnati Fossils : An Elementary Guide to the Ordivician by R. A. (editor) Davis

By R. A. (editor) Davis

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Extra info for Cincinnati Fossils : An Elementary Guide to the Ordivician Rocks and Fossils of the Cincinnati, Ohio, Region

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Note crooked tubes and coarse transverse corrugations. Entire Maysvillian. 17-19 milleranus. Bryozoan. S h a p e variable, from cylindrical to f a n - l i k e . Fig. 31 s h o w s an e n l a r g e m e n t of the surface with patches w h e r e the apert u r e s a r e e n l a r g e d ( c a l l e d m a c u l a e ) . Fairmount through Corryville. A r t i c u l a t e b r a c h i o p o d . This g e n u s differs f r o m Rafinesquina, ( P I . I, Figs. 1-4) by h a v i n g the brachial valve convex to the exterior (Fig.

Internal m o l d , s h o w i n g unorn a m e n t e d volutions and a moderately high s p i r e . S h e l l itself is s u b c o n i c a l , w i t h sharply angulated whorls. Fairmount. falciformis. 36 B r y o z o a n . Has c h a r a c t e r i s t i c flat, b l a d e shape, and pattern of diamond-shape a p e r t u r e s . Fig. 1 9 e n l a r g e d . M t . H o p e a n d Fairmount. 20,21 Cyclonema Articulate brachiopod. Resembles Rhynchotrema but has a m o r e t r i a n g u l a r o u t l i n e , f i n e r p l i c a t i o n s , a small but d e f i n i t e c a r d i n a l a r e a , a n d a l o w e r f o l d a n d sulcus.

B r y o z o a n . Branches of zoarium characteristically flattened and expanded. Corryville. 9 Dekayia aspera. B r y o z o a n . Enlarged surface-view. O t h e r s p e c i mens s h o w n on P I . Ill, Figs. 25, 26. 10 Si /»/<)( ran/a (ilosa. II Pseudolingula sp. Inarticulate brachiopod. N o t e triangular outline, w h i t e , phosphatic shell material, and concentric growth-lines. Enlarged X4. G e n u s found throughout C i n c i n n a t i a n . 12,13 14-16 Ralostumclla gracilis. Bryozoan. Note small angle between branches, small apertures, and smooth surface.

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