76 The Ohio Journal of Science [Vol. XXI, No. 2, 



PLATE II. 



Fig. 1. Ccelocystis snhglobosus (Hall). 



A, Type, viewed from above. Specimen distorted, with pectinirhomb on plates 

 14 and 15; apical end crowded toward lower right-hand corner. B, lateral view, 

 showing pectinirhomb on plates 1-5, and 14-15. Specimen numbered 2027 and 

 preserved in the American Museum of Natural History in New York City. From 

 the Racine dolomite at Racine, Wisconsin. 



Fig. 2. Ccelocystis subglobosus (Hall). 



A, Lateral view showing pectinirhomb on Plates 12-18, and along the lower 

 left-hand margin a faint indication of the pectinirhomb on plates 1-5. B, Lateral 

 view, showing anal aperture and pectinirhomb on Plates 12-18. From the Welch 

 collection deposited in Wilmington College, at Wilmington, Ohio. Found in the 

 Cedarville dolomite in the Moodie quarry in that city. 



Fig. 3. Ccelocystis subglobosus -(Hall). 



A, Viewed from above, showing anal aperature and pectinirhombs on plates 

 14-15 and 12-18, also the divided madreporite plate 2.3, not numbered in the figure. 

 B, Lateral view, showing the anal aperture and marginal views of the same pec- 

 tinirhombs. C, Basal view, showing the pectinirhomb on plates 1-5; also the 

 tendency toward a quadrangular outline of the impression produced by the invag- 

 ination of the basal plates on the cast of the interior. The size of the attachment 

 area for the column is indicated. From the Cedarville dolomite at Cedarville, 

 Ohio. 



Fig. 4. Ccelocystis subglobosus (Hall). 



Oblique lateral view of distorted specimen, showing anal aperture and mar- 

 ginal view of pectinirhomb 12-18. Specimen numbered 1603 in the Illinois State 

 Museum at Springfield, Illinois. From the Racine dolomite at Racine, Wisconsin. 



Fig. 5. Ccelocystis subglobosus (Hall). 



A, Theca viewed from above, showing protruding anal aperture, the pectin- 

 irhomb on Plates 14-15, a marginal glimpse of that on plates 12-18, and relatively 

 numerous instances of divided or supplementary plates. B, Same, viewed from 

 in front. D, Same, viewed from the side. C, Basal view of another specimen 

 showing pectinirhomb on plates 1-5; also the quadrangular invaginated base of the 

 cast of the interior. Specimens numbered 35155 and 35061 respectively in the U. S. 

 National Museum at Washington, D. C, the originals of plate diagrams 37 and 36 

 of Schuchert in his paper on Siluric and Devonic Cystidea and Camarocrinus, 

 Smithsonian Miscellaneous Collections, Vol. 47, Pt. 2, 1904, pp. 248 and 247. From 

 the Racine dolomite at Chicago, Illinois. 



Fig. 6. Callocystites jewetti-elongata Foerste. 



Base of another specimen, showing pectinirhomb on plates 1-5; also large size 

 of attachment area for column. From the Cedarville dolomite at Cedarville, Ohio. 



Fig. 7. Hallicystis imago (Hall). 



A, Lateral view with anal aperture along the margin on the right of the figure, 

 also the pectinirhomb on plates 12-18, and a marginal view of that on plates 1-5 

 along the lower left-hand margin. B, Lateral view, showing pectinirhomb on 

 plates 1-5. C, Basal view, showing the same pectinirhomb, also the small area 

 for the attachment of the column. From the Cedarville dolomite at Cedarville, 

 Ohio. 



Fig. 8. Ccelocystis subglobosus (Hall). 



Figure prepared from a clay cast of an impression showing part of the width 

 of an entire theca and the attached column. The entire theca was about 4 mm. 

 wider. Even with this increased width the column is relatively very large. Pec- 

 tinirhomb on plates 1-5, and impressions of the recumbent rays, showing branch- 

 ing. Surface pitted. From the Cedarville dolomite at Springfield, Ohio. 



