AMERICAN SILURIAN CRINOIDS 
Pisocrinus gorbyi S. A. Miller 
Figs. 40, 40a. Lobed and tubercular specimen, ant. and ventral views. 
41, 41a, 42. R. ant., ventral and basal views of similar specimens. 
Lobelville formation, above Beech River, Flatwoods, Tennessee. 
43,44,45. Ventral views of non-tubercular specimens from Rise Mill, Perry County, Ten- 
nessee. 
Pisocrinus 
Fig. 46. Generic diagram. 
