26 SMITHSONIAN INSTITUTION 



PLATE X 

 (All figures natural size except where otherwise stated) 



PAGE 



Figs. 1-3. Anisocrinus interradiatus Angelin 162 



Fig. 1(7. The type, original of Angelin, pi. 22, fig. 18. Crown minus arms, posterior view ; RA large, 

 under r. post. R. X 2. Wisby (/). 



ih. Basal view of same ; smaller IB at anterior. X 2. 

 20, b. Basal and posterior views of similar specimen, found since Angelin. X 2. 



Wisby (/). 

 3a, b. Complete crown found since Angelin, anterior and anal side ; showing the full charac- 

 ters of the genus. Note the huge iBr, and swelling of the calyx at the iBr zone, con- 

 traction above, and square truncation of the crown distally. X 2. Gotland (/). 

 Wenlock Gr. ; Silurian. Gotland, Sweden. 



All specimens in the Riks Museum, Stockholm. 



Fig. 4. Anisocrinus angelini Wachsmuth and Springer 163 



Figs. 4a, b. The type, original of Angelin, pi. 19, fig. 4, figured as Lecanocrinus macropctalus. Com- 

 plete crown of very small individual, anterior and posterior views. X 3- Riks 

 Museum. Gotland (/). 



Wenlock Gr. ; Silurian. Gotland, Sweden. 



Figs. 5-6. (?) Anisocrinus irregularis n. sp 165 



Fig. Z<i. Crown, with base injured; original of Angelin, pi. 19, fig. 3, and pi. 22, fig. 27, as 

 Lecanocrinus macropctalus; posterior view. Has the habitus of the genus, but with 

 heterotomous arms and no RA. X 2. Riks Museum. Gotland (/). 



5&. Anterior ray of same. X 2. 



6. Small specimen, r. post, and 1. ant. rays. X 2. Riks Museum. Luminelund (c). 



Wenlock Gr. j Silurian. Gotland, Sweden. 



Fig. 7. Anisocrinus oswegoensis (Miller and Gurley) 164 



Figs, ya, b, c. Left anterior, posterior, and right posterior views of type, figured by Miller and 

 Gurley as Lecanocrinus. University of Chicago. 

 Niagaran; Silurian. Oswego, Illinois. 



Figs. 8, 9. Anisocrinus greenei (Miller and Gurley) 163 



Fig. 8. Right posterior view of type, figured as Lecanocrinus; the only view of the specimen 



obtainable, as it lies imbedded in the matrix. University of Chicago. Near Louisville, 



Kentucky. 



9. Much distorted specimen perhaps of this species from Decatur County, Tennessee. 



Author's collection. 



Niagaran (Brownsport) ; Silurian. Kentucky and Tennessee. ^ 



Figs. 10-14. Asaphocrinus bassleri n. sp 178 



Fig. loa. Mature flattened specimen, anterior view; showing strong perisome in iBr areas; i and 2 

 IBr, and 2 IIBr. 

 106. Posterior view of same. Shows the anal structures, with tube plates somewhat dis- 

 placed, and strong perisome to the left; anal x united by suture to post. B. and RR; 

 strong perisome in 1. post, interradius; broad arms; and 2 IIBr. 



11. Anterior view of large, nearly complete specimen, considerably flattened, having i IBr in 



the anterior ray, and very strong perisome. It shows the form and proportions of the 

 arms almost to their extremities, and of the proximal part of the stem. 



12. Flattened specimen with more of the stem attached, showing elongation and non-alternat- 



ing of columnals distally. It is a left posterior radial view, and shows the plates 

 of the very large anal tube rising above the level of the second arm bifurcation ; has 

 I IBr in r. ant. ray. 



13. A fine specimen much flattened, with arms complete; 1. post, interradial view. Shows 



large anal and succeeding tube plates with bordering perisome, rays with i and 2 IBr 

 and IIBr. 



14. Basal view of very large specimen. Shows especially the truncate posterior basal, and 



sutural connection with it of the large anal plate. 



Niagaran, Brownsport limestone; Silurian. Decaturville, Tennessee. 



All the specimens are in the author's collection. 



