38 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 76 



Catillocrinus carpenter! (Wachsmuth) 28 



Fig. I. A nearly complete crown with proximal part of stem, posterior 

 view ; showing the great length and delicacy of arms, with tube 

 extending to their distal ends. X I- 



2. The tube in another specimen seen for almost its entire length, 



with remnants of arms at lower part — the calyx being lost. XI • 



3. Anterior view of a very small specimen with 13 arms, and delicate 



stem. Calyx was detached from matrix and anns counted. X f • 



4. Specimen with calyx plates displaced, showing small size of arms. 



5. Specimen with calyx and part of arms detached from matrix, 



posterior view ; showing full contour of calyx, strong suture 

 under r. post. R, and anal plate at same level as arms, with no 

 raised process at outer margin. X 3- 



6. The same in original condition, from anterior radial. X 3- 



7. The same, basal view of calyx, showing division into 3 plates. 



X3- _ 



8. Diagrammatic view of same, showing form and proportions of 



plates. 



9. 10, II. Posterior, anterior and basal view of similar detached 



specimens in which the calyx structures are well shown. X 3- 



12. The type, from specimen in Illinois State Museum. 



Nos. I to 12 from Monroe County, Illinois. 



13, 14. Anterior and right anterior radial views of specimens show- 



ing details of arms. X I- 



15. Similar specimen showing the extremely narrow left anterior 



radial. X I- 



16. Anterior view of specimen with stem enlargement and calyx 



plates well shown ; also the hollow side of tube. X I- 



17. Posterior view showing the rounded side of tube; the two basal 



plates have been detached at their sutures, leaving one of the 

 three remaining in place. X I- 



18. Lateral view showing tube from its origin on r. post. R. X f • 



Nos. 13 to 18 from Huntsville, Alabama. 



Mississippian, all from lower part of Chester, Illinois and 



Alabama. 



