2G2 The Ohio Journal of Science [Vol. XVII, No. 7, 



Plate X. 



Fig. 1. Periechocrinus cylindricus. A, internal cast, retaining outlines of one 

 of the sets of interradial plates on the left, beginning with ir. B, 

 another cast, retaining outlines of anterior brachial series, immediately 

 above radial r, and also of the adjacent interradial sets of plates. From 

 Cedarville dolomite, at the eastern Mills quarry, southwest of Spring- 

 field, Ohio. 



Fig. 2. Lampterocrinus inflatus-minor. A, posterior view of internal cast, 

 with tegmen strongly inflated on left side of posterior interradial area; 

 pb, posterior basal, with infra-basals beneath. B, view of right anterior 

 interradial area; the inflated posterior part of tegmen not seen on 

 account of tilting; Ar, anterior radial. From euphemia dolomite, at 

 Jackson quarry, two miles south of Covington, Ohio. 



Fig. 3. Periechocrinus tennesseensis. Interior cast; Ar, anterior radial. From 

 the Cedarville dolomite at the eastern Mills quarry, southwest of 

 Springfield, Ohio. 



Fig. 4. Dictyonella reticulata. A, brachial valve; B, same, enlarged 2.5 diame- 

 ters. From upper Osgood clay, at Harrods Creek, 5 miles northeast 

 of Louisville, Kentucky. 



Fig. 5. Habrocrinus benedicti. A, anterior view, Ar, anterior radial; plates 

 absent from upper part of body. B, view of internal cast of tegmen, 

 with base of anal tube; right posterior ray terminating in two arms. 

 Found in lower part of cjuarry in eastern part of Muncie, Indiana, on 

 west side of river, above the horizon of the Cedarville dolomite of 

 Ohio. 



Fig. 6. Habrocrinus sp. Posterior view, with upper right-hand part crushed in, 

 accompanied apparently by a displacement of the anal tube whose 

 present location is indicated by the dotted lines; X, first anal plate. 

 From the Cedarville dolomite at the eastern Mills c^uarry, southwest 

 of Sprmgfield, Ohio. 



Fig. 7. Stricklandinia louisvillensis. Two brachial valves. 



Fig. 8. Holocystites greenvillensis. Diagram of plates surrounding the anal 

 area, enlarged. 



Fig. 9. Lingulops cliftonensis, Foerste. Pedicel valve, enlarged. Richmond 

 group, at Clifton, Tennessee. 



Fig. 10. Acervularia (?) paveyi. Radiating septa apparently interrupted half 

 way from center by a cylindrical wall, the actual presence of which has 

 not been fully verified. From the upper part of the West Union formation 

 at Hillsboro, Ohio. 



