PLATE XI— Continued. 



ICSTHTOCRINUS SUBANGULARIS, HaLL. 

 Page 367. 



Pig. 15. Lateral view of a specimen from Bridgeport, Illinois, preserving the substance of the 

 plates. 

 " 16 View of a specimen from Waldron, Indiana, from which the species was originally de- 

 scribed. 



Caryoorinus ornatus, Sat. 



Fig. 17. Lateral view of an internal cast of a specimen of this species, possessing the usual 

 characters of the species as they occur at these localities. 



Cryptodiscus. 



Fig. 18. The calyx of a Crinoidean .' of a new and peculiar type, for which the name Cetpto- 

 DisCTJS is suggested. 



