82 SMITHSONIAN INSTITUTION 



PLATE XXXVIII ' 



PAGE 



(All figures natural size except where otherwise stated) 



Figs. 1-2. Cleistocrinus humilis ( Angelin) 293 



Fig. 10. A cotype, anterior side view of calyx ; original of Angelin, pi. 23, figs. 28, 280, as Cal- 



piocrinus humilis. Natural size. Riks Museum. Klinteberg (/). 



i&. Posterior view of same. 

 If. Basal view of same after stem ossicles removed. Shows IBB completely resorbed ; 



BB, RA and RR wholly included in the column facet ; anal x not connecting with B. 



X2. 

 id. Interior view of same; an interbrachial plate partly formed at right of x, but not reaching 



to the exterior. X 2. 

 20. Dorsal view of the other cotype; Angelin, pi. 23, figs. 286^ c; pi. 26, fig. 17. All plates below 



IBr concealed by the column. X 2. Riks Museum. 

 26. Interior view of same; IBB and part of BB resorbed; RR meeting below anal x. X 2. 

 Wenlock Gr. ; Silurian. Gotland, Sweden. 



Figs. 3-6. Synaptocrinus nuntius (Hall) 302 



Fig. 20'- The type, original of Hall, pi. I A, fig. 12; a crushed specimen, from 1. post, interradius, 



showing surface ornament and lateral projection of brachials. Am. Mus. Nat. Hist. 



Erie County, New York. 

 3&. Basal view of same, showing IBB within ring of BB, and the large post. B. 

 40. A mature specimen with stem, and arms to fourth bifurcation, somewhat flattened ; from 



r. ant. interradius. Lateral extension of brachials continued to highest plates. 



Author's collection. Bellona, New York. 



4&. Posterior view of same, showing large angular post. B with no anal plate succeeding. 

 4c Restoration of crown, showing the normal contour. 

 4d. Diagrammatic view of base, composed from this specimen and the type ; to show relation 



of basal plates. 



5. Posterior view of a small specimen from Erie County, New York, showing angular form 



of post. B. X 2. Columbia University, New York. 



6. Anterior view of another specimen from Erie County, New York, showing characteristic 



form and sculpturing of plates. Author's collection. 

 Hamilton Gr. : Middle Devonian. New York. 



