100 SMITHSONIAN INSTITUTION 



PLATE XLVII 

 (All figures natural size except where otherwise stated) 



PAGIv 



Figs. 1-6. Gnorimocrinus expansus (Angelin) 354 



Fig. I. The type, original of Angelin, pi. 20, fig. 16; posterior view, showing rhombic radianal, and 

 large anal tube resting in socket at right shoulder of post. B. X 3- 



20. Similar specimen, anterior view. X 2. 



2&. Same from posterior side. X 3- 



2c. Anal structures of same seen from the side, showing small plates of perisome bordering 

 the tube. X 3- 



30. Another specimen from r. ant. interradius. X 2. 



3fc. Detail of r. ant. interradius, showing perisome. X 4. 



4a. The largest specimen, from 1. ant. interradius. X 2. 



4&. Detail of r. post, interradius, showing perisome. X 4. 



5. Specimen with abnormal anal side ; very small H-K. and tube-plates partly connected with 



R at left side. X 2. 



6. Basal view of abnormal specimen, with RA pentagonal and within ring of BB. X 2. 



Wenlock Gr. ; Silurian. Gotland, Sweden, Follingbo (/). 



All specimens in Riks Museum, Stockholm. 



Figs. 7-12. Gnorimocrinus cirrif er n. sp 3SS 



Fig. 7. Mature specimen somewhat flattened, with nearly complete stem, and remnants of several 

 whorls of cirri ; anterior view. 



8. Similar specimen ; posterior view, showing" anal tube. 



9, ID. Posterior and basal views of two small specimens. Fig. 9, X 2. Fig. 10, X 3- 



11. Small specimen, with complete stem and branched root; 1. post. view. 



12. Youngest specimen, with stem complete. X 2. 



Brownsport limestone; Niagaran. Decatur County, Tennessee. 

 All specimens in author's collection. 



Figs. 13-17. Gnorimocrinus varians n. sp 356 



Fig. 13c. Right anterior view of adult injured specimen; showing perisome in iBr areas, and 



2 IIBr. 

 I3fo. Posterior view of same, showing anal tube. 

 140, b. Posterior and basal views of crushed specimen, showing anal tube and strong perisome 



attached to its right side; 2 and 3 IIBr. 



15. Anterior view of large specimen with 3 IIBr. 



16. Small specimen, with very large RR. 



17. Anterior view of small specimen with stem. 



Brownsport limestone ; Niagaran. Decatur County, Tennessee. 

 All the specimens are in the author's collections. 



Fig. 18. C ?) Eutaxocrinus perplexus n. sp 365 



Fig. 180. Anterior view of tj'pe, an abnormal specimen ; slightly flattened crown, with arms beyond 

 the fourth bifurcation ; iBr touching BB. Author's collection. 

 18&. Right posterior view of same, showing the very large anal tube having some lateral con- 

 nection with adjoining radials ; r. post, ray malformed, producing a plate resembling 

 RA, which is probably sporadic. 



Middle Devonian. Verviers, Belgium. 



