112 PALEONTOLOGY OF OHIO. 



Genus EHIKOPORA, Hall. 



(Pal. N. Y., Vol. II., p. 48, 1852.) 



Rhinopoea frondosa (n. sp.). 



Plate 5, figs. 8, 9. 

 Bryozoum growing in thin, broad, irregular expansions, sub-palmate 

 or sub-ramose ; cellulose on one face only (no evidence of cells on the 

 opposite side has been seen in any of the specimens examined). Cells 

 small, oval, arranged in regular rows where not obstructed in their 

 regular growth, their border not distinctly raised to form a lip, but ap- 

 pearing like the punctures made by a pin in the surface of a soft sub- 

 stance, when directed obliquely to the plane of the surface ; spaces be- 

 tween the ranges of cells depressed, and a little less than the width 

 of the cells. Surface of the frond traversed by depressed, ramifying 

 grooves, at irregular distances, which are more deeply excavated than 

 the spaces dividing the ranges of cells ; grooves bifurcating at irregular 

 distances, the bifurcations alternating on the opposite sides, and extend- 

 ing about a tenth of an inch along the face of the frond, between the 

 cells. There are also distant, slightly elevated maculae, irregularly dis- 

 posed, but apparently having their centers at a bifurcation of one of the 

 grooves ; but all of the bifurcations do not form centers of maculae. 



The species bears considerable resemblance to R. verrucosa, Hall (Pal. 

 N. Y., Vol. II., p. 48, pi. 19, fig. 1), from the same formation at Flamboro 

 Head, Canada West ; but differs in not having the distinctly elevated, 

 oval, almost sac-like cells of that species, in the presence of the elevated 

 maculae, and in the more regular ramifications of the grooves on the sur- 

 face. In that species this feature is composed of raised lines, instead of 

 grooves. 



Formation and locality : In the limestone of the Clinton group, near Dayton, Ohio. 



Genus STICTOPORA, Hall. 

 (Pal. N. Y., Vol. I., p. 79, 1847.) 



Stictopoea magna (n. sp.). 



Plate 5, figs. 5, 6. ' 

 Bryozoum forming broad, strong, somewhat rigid, bifurcating stipes, 

 the sides or margins of which are parallel ; bifurcations sometimes form- 

 ing an angle of about twenty-five degrees, the inner margins of the 

 branches almost or quite overlapping. At other places the branches or 



