260 The Ohio Journal of Science [Vol. XVII, No. 7, 



Plate IX. 



Fig. 1. Cvathophyllum roadsi. A, B, C, D, left sides; E, F, G, right sides of 

 coralla; H, I, nearly straight individuals. Specimens B, E, F, and H 

 retain their areas of attachment. J, internal structure revealed by a 

 transverse break; with transverse tabula at center, with the edge 

 of another beneath on the right, and fragments of two more above 

 on the left; with septa radiating toward the center, and with disseppi- 

 ments numerous near the outer wall where there is a tendency toward 

 filling by stereoplasm; magnified 2.5 diameters. From the upper part 

 of the West Union formation at Hillsboro, Ohio. 



Fig. 2. Schuchertella higginsportensis. A, interior of brachial valve; exterior 

 of another valve regarded as belonging to the same species; both 

 enlarged 2.5 diameters. From the Eridorthis nicklesi horizon, above 

 the Fulton clay, at Ivor, Kentucky. 



Fig. 3. Holocystites greenvillensis. A, B, left sides; C, right side of theca; 

 three specimens, imperfect at top and bottom, with anal opening between 

 first and second row of plates from the top, that of specimen B dia- 

 grammed on plate III in figure 8. From the Cedarville dolomite, 

 4.5 miles east of Greenville, Ohio, on Greenville creek at the Brierly 

 quarry. 



Fig. 4. Stropheodonta sp. Cast of exterior of a valve, enlarged 2.5 diameters, 

 assumed to have been the convex or pedicel valve since the cast is 

 distinctly concave anteriorly. The postero-lateral angles are not 

 preserved and may not have been acute, as indicated. From the 

 Cedarville dolomite at the Lewisburg Stone Company quarry, a mile 

 northwest of Lewisburg, Ohio. 



Fig. 5. Calostylis parvula. Same specimen as fig. 2A, on plate I, enlarged 4.5 

 diameters. The presence of pores passing through the central mass 

 of septa and tabulae is seen near A, especially toward the right. Dis- 

 seppiments or synapticula connecting the septa are visible along the 

 lower weathered part. From the upper part of the Laurel limestone 

 at the Reinheimer quarry, southeast of New Paris, Ohio. 



