34 SMITHSONIAN INSTITUTION 



PLATE XIV 



(All figures natural size except where otherwise stated) 



PAGE 



Figs. i-S. Hormocrinus tennesseesis (Worthen) 167 



Fig. la. Specimen with complete crown in almost natural contour, from anterior radius. 



lb. Posterior view of same; showing anal plate with sloping shoulders and truncate apex 

 connecting with a second range of 3 plates, and iBr with similar plates following. 



ic. Distal view of same, showing short, stout arms. 



id. Basal view of same, enlarged, showing the angular effect produced by the radial ridges 

 branching to the basals. X 2. 



2a. Another specimen somewhat flattened, from 1. ant. radius ; iBr plate broad, directly fol- 

 lowed by perisome. 



2&. Crown from same position, enlarged. Distal parts of coiled arms, and slight remnants of 

 perisome visible in iBr areas. X 2. 



2c. Right posterior view of same. Natural size. 



3. The largest specimen, somewhat flattened, with stem and arms complete ; anterior view. 



The calyx above IBB is tilted back and foreshortened ; stem like a string of beads, 

 and tapering to a fine point. 



4. Smaller specimen with part of stem, having shorter proximal columnals ; calyx tilted and 



foreshortened. 



5. Still smaller specimen with stem ; proximal columnals relatively shorter. 



Niagaran, Brownsport; Silurian. Decaturville, Tennessee. 



All the specimens are in the author's collection. 



Figs. 6-7. Hormocrinus anglicus n. sp 168 



Fig. 6. Flattened specimen with arms and stem, from 1. post, interradius ; IBr nearly as large as 

 RR. British Museum, No. E1426. 

 7. Lateral view of another specimen. Author's collection. 

 Wenlock Gr. ; Silurian. Dudley, England. 



Fig. 8. Hormocrinus gotlandicus n. sp 169 



Fig. 8a. The type, in about natural contour seen from anterior radius. Has the arms nearly com- 

 plete, and part of the stem; iBr probably directly followed by perisome; 3 IBr in 

 ant. ray. X f • Riks Museum. Alskog (/) . 



8&. Same from left anterior ray with 5 IBr. X |. 



8c. Posterior view, showing broadly truncate anal plate; 3 and 4 IBr in posterior rays. Xl- 

 8rf. Basal view of same. X I- 



Wenlock Gr. ; Silurian. Gotland, Sweden. 



