210 
SMITHSONIAN INSTITUTION 
PLATE 19 
(Figures natural size unless otherwise stated) 
Marsipocrinus magnificus (Troost) 
Figs. I. la, i&. Lateral, dorsal and ventral views of type in Troost collection, U. S. National Mu- 
seum ; dorsal cup highly sculptured with coarse rugae and prominent ridges ; tegmen 
plates large and nodose ; 4 arms to the ray. 
Beech River formation; Decatur County, Tennessee. 
Marsipocrinus coelatus (Phillips) 
Fig. 2. Dorsal view of large specimen with outstretched arms, 4 to the ray. 
3. 3a. Specimen with arms nearly complete, and part of stem. 
4. Small specimen showing contour of calyx, and typical surface ornament ; lateral view. 
5. Lateral view of similar specimen with part of arms attached. 
6. A very young specimen, with intense surface marking : gastropod seated over anus. 
6 a. Basal view of same enlarged, showing sharp wrinkles vertical to the sutures. X 2. 
7. A cluster of 9 stems springing from a common base on rock or coral, 4 with crown at- 
tached ; reduced to 1/3. 
Wenlockian, Silurian; Dudley, England. 
