2o8 
SMITHSONIA]^ INSTITUTION 
(Figures natural 
Marsipocrinus 
Figs, i, la. Dorsal and ventral views of a typical specimen, large and with very thin plates, more or 
less displaced by pressure ; dorsal surface marked by extremely fine striae, and tegmen 
by numerous small tubercles. 
2. Dorsal side of similar specimen not distorted, and with striae more distinct. 
3. Specimen with arms and part of stem ; striae indistinct. 
4. 5. Two detached basal pentagons (as usually found) seen from the inner side, showing 
varying form of lumen. 
6, 6 a, 6 b. Lateral, dorsal and ventral views of a well preserved dorsal cup of stronger con- 
struction than the preceding, and with striate marking remarkably distinct. 
7, 7 a. Lateral and ventral views of a very robust specimen having the surface covered with 
small tubercles. Not of this species, but probably a variant of M. tennesseensis. 
Beech River formation; Decatur County, Tennessee. 
PLATE 18 
size unless otherwise noted) 
striatissimus new species 61 
