8o SMITHSONIAN INSTITUTION 



PLATE XXXVII 

 (All figures natural size except where otherwise stated) 



Figs. 1-6. Clidochirus pyrurti Angelin 296 



Fig. I. The type, original of Angelin, pi. 22, fig. 23, slightly flattened ; posterior view with missing 

 parts of base restored in outline. Shows the large BB; large RA under r. post, ray; 

 and the anal series with rays arching over and abutting above it. X 2. Riks Museum. 



Wisby (c). 



2. Very young specimen, uncompressed, with proximal columnals attached and surface orna- 

 ment in perfect preservation ; right posterior view. Xf- Riks Museum. 



Wisby (c). 



3a. A perfect crown, but little flattened, with column probably nearly complete ; figured by 

 Angelin (pi. 17, fig. 6) as Ichihyocrinus pyriforinis; right posterior view. The great 

 increase in length of the distal columnals indicates that they are near the end. XI' 

 Riks Museum. Wisby (c). 



3&. Posterior view of lower part of crown after removal from the stone, showing the com- 

 plete anal structure of this genus. Xf- 



4a. Fragment of IIIBr from Snackgardet (Wisby d), showing character of the ornamenta- 

 tion. X3 (enlargement fraction omitted on plate). Riks Museum. 



4fc. IIIBr from the same, further enlarged, showing the strong vertical wrinkles upon a 

 granular background. X 8. 



5a. A large and nearly complete, flattened specimen, with surface markings mostly removed 

 by weathering ; anterior view. Riks Museum. Tofta (c). 



Sb. Posterior view of same. 



5f. Basal view of calyx. 



6. A worn specimen with surface markings destroyed ; rays a little more angular than usual. 

 Natural size. Author's collection. Wisby (c). 



Wenlock Gr. ; Silurian. Gotland, Sweden. 



Figs. 7-8. Clidochirus americanus n. sp 298 



Fig. ya. A nearly complete crown, anterior view. Author's collection. 

 76. Right posterior radial view, showing small size of RA. 



8. Another specimen from same locality with nearly complete stem; right posterior inter- 

 radial view, showing the same small RA. Author's collection. 

 Clinton Gr. ; Silurian. Dayton, Ohio. 



Figs. 9-1 1. Clidochirus keyserensis n. sp 298 



Fig. 9a. Specimen with complete crown, but little flattened ; posterior view, showing the deeply 

 rounded rays, and the long anal series. Author's collection. 

 96. Basal view of same. 



10. Anterior view of another specimen with brachials more angular. Author's collection. 



11. Outline restoration based upon the foregoing, and another specimen with column pre- 



served. Author's collection. 



Helderbergian ; Lower Devonian. Keyser, West Virginia. 



Figs. 12, 13. Clidochirus schucherti (Talbot) 299 



Fig. 12(1. The type, original of Miss Talbot's Ichthyocrinus schucherti (Am. Jour. Sci., XX, PI. Ill, 

 fig. i) ; anterior radial view. Complete crown in nearly natural contour, with part of 

 column. Yale University Museum. 

 126. Right posterior view of same ; anal side cannot be seen in the specimen, but the very 



large basals deny Ichthyocrinus. 

 130. A specimen from Schoharie, New York, right anterior view. Author's collection. 

 136. Right posterior view of same, showing the anal and radianal plates. 



Helderbergian ; Lower Devonian. Clarksville and Schoharie, New York. 



Fig. 14. (?) Clidochirus greenei ( S. A. Miller) 300 



Fig. 14. The type. Original of Plate 8, fig. 3, Adv. Sheets, i8th Rep. Geol. Surv. Indiana, as 

 Ichthyocrinus greenei; anterior view, anal side unknown. Jefferson County, Ken- 

 tucky; said to be Lower Carboniferous, but may be Silurian. Coll. Mr. Geo. K. 

 Greene, now in Am. Mus. Nat. Hist. New York. 



