SMITHSONIAN INSTITUTION 
PLATE 4 
(Figures natural size unless otherwise stated) 
Paragazacrinus rotundus new species 
Complete calyx, with tegmen surmounted by a central spine and divided by interambulacral 
and secondary ridges. X 5/3- 
Dorsal view of calyx showing the 5 IBB at bottom of indented pit; RR separated all around 
by BB and iBr. X 5/2. 
Another specimen, with smaller basal cavity. X 2. 
Ventral view of same with 5 large tegminal plates in place, but central spine lacking; 
shows openings for 10 arms. X 2. 
Isolated pyramid with central spine attached. X 2. 
Laurel limestone ; St. Paul. Indiana. 
Paulocrinus biturbinatus new genus and species 
Figs. 5, 5a. Post, and r. post, views of complete calyx with tegmen passing into a large anal tube; 
all plates strongly nodose or rugose ; r. post, ray has only i IBr. 
5 b. Basal view of same, showing irregular form of IBB, 2 large and 3 small, and 5 BB and 
2 RR connecting with them. 
Sc. Diagram showing arrangement of basal plates. 
Laurel limestone ; St. Paul, Indiana. 
Wilsonicrinus discoideus new genus and species 
Dorsal and ventral views of the only specimen — a broad disk slightly convex below and 
passing into a strong anal tube above; 4 IBB; fixed pinnules from cuneate secundi- 
brachs incorporated in calyx wall, leading to interradial pinnule openings at margin, 
conspicuous on ventral side, between the 10 arm-openings. X 3/2. 
Emperocrinus indianensis Miller and Gurley 
A typical specimen, of simpler structure than the preceding, and having S IBB ; inter- 
radial pinnule openings shown ; dorsal and ventral views. 
Laurel limestone ; St. Paul, Indiana. 
Rhodocrinidae, genus and species indet 
Fragment of large stem standing at angle with calyx covering 4 large IBB as seen from 
the interior; RR separated all around; traces of injury by boring parasites. Outer and 
inner views. 
Laurel limestone ; St. Paul, Indiana. 
Macrostylocrinus fasciatus Hall 
Fig. 9. Posterior view of highly elevated calyx, with anal series leading to opening at extreme 
margin of tegmen. X 2. 
ga . Basal view of same. X 3/2. 
gb. The tegmen, with ambulacra fully exposed flanked by numerous small plates ; a small anal 
opening at extreme edge of tegmen. X 3/4- 
Waldron shale; Hartsville, Indiana. 
Macrostylocrinus granulosus Hall 
Fig. 10. Post, view of calyx from Madison, Indiana, with anal series leading to opening; surface 
granulose. X 2. 
lOfl. The tegmen, with anal opening covered by pyramid of small plates; a large posterior 
oral ; and ambulacra radiating to arm-openings with numerous small plates between 
of uncertain arrangement. X 2. 
II, iia, iifi, lie. R. ant., post., and ventral views of small specimen from Newsom, Tennessee, 
with tegmen well preserved. X 2. 
12, 13. Specimens from Newsom and Decatur County, Tennessee, perhaps of this species. 
X 3/2. 
Waldron shale; Indiana and Tennessee. 
Figs. 6, 6a . 
Figs. 7, 7a . 
Figs. 8, 8a. 
180 
Fig. I. 
2. 
3- 
3a. 
4. 
