132 SMITHSONIAN INSTITUTION 



PLATE LXIII 



(All figures natural size except where otherwise stated) page 



Figs. 1-4. Parichthyocrinus subovatus (Miller and Gurley) cont 415 



(Also on Plates XXI; LXII) 



Fig. I, 2. Mature and young specimens from same locality as those on preceding plate, with stems 



complete, showing' the presence of cirri irregularly toward the root. Author's 



collection. 

 Sa, b. Left anterior and basal views of a specimen from the same locality and associated with 



the foregoing, having sporadically the anal structure somewhat similar to that of 



Euryocrinus. Author's collection. 

 3C. Anal plates of same, showing perisome in upper part. 

 4. Base of a free calyx, showing relation of IBB to adjoining plates in many representative 



specimens. X 2. Author's collection. 

 Upper part of Keokuk Gr. ; Lower Carboniferous. Indian Creek, Indiana. 



Figs. 5-6. Parichthyocrinus crawfordsvillensis (Miller and Gurley) 416 



Fig. 5. The type ; posterior view not figured by the authors ; showing modification of anal struc- 

 tures in the direction of Forbesiocrinus. A very mature individual, with strong devel- 

 opment of interbrachials, and the base considerably distorted. From the Crawfords- 

 ville crinoid bed, a different horizon from the preceding. University of Chicago. 

 6. Less mature specimen from same beds at Crawfordsville; lateral view, showing same 

 characters as the last specimen, together with complete stem and distal cirri. Author's 

 collection. 



Keokuk Gr. ; Lower Carboniferous. Crawfordsville, Indiana. 



