PLATE 6 



Megistocrinus missouriensis Branson and Wilson 

 Page 66. 



Fig. 1. Basal view of the holotype. 



(Mineola limestone of Montgomery County.) 



Megistocrinus mineolaensis Branson and Wilson 

 Page 66. 



Figs. 2-4. Top, side, and basal views of the holotype. 

 (Mineola limestone of Ralls County.) 



Stereocrinus moori Branson and Wilson 

 Page 62. 



Fig. 5. Basal view of one of the cotypes. 



Fig. 6. Top view of a cotype which has clear sutures. About one-third broken away. 

 (Mineola limestone of Ralls County.) 



Melocrinus lylii Rowley 

 Page 59. 



Figs. 7 and 8. Side and top views of the holotype. (Collection of R. R. Rowley. 

 Snyder Creek shale of Callaway County.) 



Spirorbis omphaloides (Goldfuss) 

 Page 57. 



Figs. 9 and 10. Views of two average specimens. (X5.) 

 (Snyder Creek shale of Callaway County.) 



