AMERICAN SILURIAN CRINOIDS 
235 
PAGE 
Stephanocrinus angulatus Conrad 139 
Fig. 13. Post. iR view of specimen with about the usual elongate form, showing sculptured .sur- 
face and vertical ridges. X 2. 
14. Specimen showing the extreme of elongation the species sometimes assumes; 1 . ant. iR 
view. X 2. 
15. Lateral view of specimen with cluster of biserial arms in place. X 2. 
iSa. The same radius from a slightly different angle, enlarged. X 4 - 
16. Tegminal view of specimen showing orals and ambulacral grooves; anus seen covered 
by pyramid of small plates. X 2. 
Rochester shale ; Lockport, New York. 
Stephanocrinus gemmiformis Hall 140 
Fig. 17. Lateral view of calyx, low and rotund, without ornament, showing fork of RR. X 2. 
18. Tegmen of another specimen, showing orals, ambulacra and anal opening. X 2. 
19, 19a. Lateral and ventral views of similar specimen from Flatwoods, Tennessee. 
Waldron shale; Newsom, Tennessee, except 19, which may be from Beech River 
formation. 
