Plate 4. 



Poge. 

 HIMEROCRINIIS PLENISSIMUS (Lyon) 12 



Fig. 1. Photograph of specimen with arms and stem, showing some of the small 

 biserial arms to part of their length, and the nodal columnals with 

 numerous coglike jirocesses, and thin internodals appearing between 

 them. Surface ornament on calyx removed by erosion, but the 

 pits at the corners of the plates, and the lateral ridges along the 

 radial series toward the arm bases, are conspicuous. 



2. Dorsal Adew of a specimen with plates well separated at the sutures, 



having the modified axillary primibrach in both three and four 

 sided forms. 



3. Dorsal view of basal plates vith several included column ossicles adher- 



ing at the bottom of the cavity, from which they have been detached 

 as in figure 2, this being the condition in which they are frequently 

 found. 



4. Dorsal Adew of a l)ase in same condition as the preceding, with some 



radials attached. 



Onondaga: Louisville, KentuclvV. 



63 



