220 
SMITHSONIAN INSTITUTION 
PLATE 24 
(All figures double size unless otherwise stated) 
Pisocrinus tennesseensis (Roemer) 
Figs. I, la, ih. Calyx of characteristic and very mature specimens; ant. and ventral views. 
2, 2a. R. ant. and ventral views of similar specimen. 
2h, 2c. Details of radial facet and processes of same. X 4- 
3, 3n. Radianal and ventral views of smaller specimen. Note the very wide facets and dove- 
tailed processes in all these ; with basals limited to the column facet. 
4, 4a. L. post, and ventral views of smaller specimen, from Martin’s Mill, Wayne County, 
Tennessee. 
5. Post, view of very mature specimen with unusual raised border of radials. 
Beech River formation ; all except No. 4 from Decatur County, Tennessee. 
Pisocrinus campana S. A. Miller 
Figs. 6, 7, 8. A series of crowns with very long arms, round calyx and high base, in contrast to 
P. quinqiielobus. Fig. 8 shows ventral side of arms, with sockets of side-pieces of 
ambulacra. 
9. A set of long arms, with ventral furrow and traces of side-pieces, detached just above 
the calyx at the sutures, showing some of the brachial articulations. 
9a. Transverse view of proximal articular face of the arms, further enlarged; section of 
anal tube plainly seen in the middle. X 4; 
10. Dorsal view of calyx from Rise Mill, Perry County, Tennessee, showing large base with 
abruptly indented column facet. 
11. iia. R. ant. and ventral views of an average calyx with wide facets and nearly rectangular 
processes, tending to expand slightly inward ; same locality as last. 
lib, lie. Details of radial facets and processes of same, seen from side and above. X 6. 
12, 12a, 12b. Ant., dorsal and ventral viev/s of more elongate specimen ; same locality. 
13, 14. L. ant. and ventral views of two other specimens from same locality. 
15. R. ant. view of similar specimen from Martin’s Mill, Wayne County, Tennessee. 
16, i6a, 17. L. ant., ventral and ant. views of somewhat more globose specimens from Flat- 
woods, Tennessee. 
18. A much larger specimen, radianal view, from Sinking Creek, Wayne County, Tennessee. 
19. Elongate specimen from Decatur County, Tennessee, ant. view. 
20. Complete crown of elongate specimen, with very long arms and part of stem; 1 . ant. view. 
21, 2ia. Extremely elongate form, r. ant. and ventral views; both the last from Decatur 
County, Tennessee. 
22, 22a, 23. Specimens from the typical area at Anderson, Marion Co., Indiana, about the 
usual size; r. ant. dorsal and post, views. 
24, 25, 26. Three abnormal specimens from the type locality at Wabash, Indiana ; small RR 
connecting with BB ; 1 . ant., r. post, and 1 . ant. views. 
27. The type specimen from Wabash, Indiana, formerly in the collection of A. C. Benedict; 
larger than average from typical area. 
All from Beech River formation, except Nos. 22 to 27, which are from the 
Niagaran of Northern Indiana. 
Pisocrinus benedicti S. A. Miller f 
Figs. 28, 29. Low and elongate forms from Anderson, Indiana, with angular processes; r. post, 
and ant. views. 
30,30a. Large specimen from St. Paul, Indiana; radianal and ventral views. 
31. Low specimen from Decatur County, Tennessee. 
32. 32a, 32b. Large oblate form from Perry County, Tennessee; radianal, dorsal and ventral 
views. 
33. Similar form with long arms, incomplete, from same locality. 
34,34a. Smaller low, rounded form from Decatur County, 1 . ant. and dorsal views. 
35,36. L. ant. and ventral views of similar specimens from Flatwoods, Wayne County, 
Tennessee. 
Laurel and Racine formations, Indiana; Brownsport, Tennessee. 
