154 



SMITHSONIAN INSTITUTION 



PLATE LXXIV 



(All figures, except fig. lo, natural size) 



Figs. i-io. Onychocrinus pulaskiensis ^Miller and Gurley 437 



(Also Plate LXXV, figs. 150, b) 



Fig. I. The type; antero-lateral view. University of Chicago. 



2. A very mature, complete specimen, with r. post, ray slightly malformed. It is of the type 



of O. ramulosus, with 3 IBB, and small anal structures, but without interbrachials in 

 the higher axils ; ramules at every second or third brachial ; and nodes on axillary 

 brachials — most of them removed by erosion. 



3. Mature specimen, with nodes on the arms well marked ; base crushed vertically. 



4. 5. Posterior and anterior views of less mature specimens with stems attached ; fig. 4 shows 



a ramule on every second brachial in many places. 



6. Smaller specimen, with good sized iBr ; anterior view. 



7. A very young specimen with no iBr; 1. post. view. 



8. Type of Onychocrinus parvus M. and G., a very young individual perhaps of this species. 



University of Chicago. Martin County, Indiana. 



9. Stem with IBB fused to top columnal ; by oversight, the small IB is drawn to left side 



instead of right. 



10. Inner floor of IBB of another specimen ; showing the funnel, and the course of the S inter- 



radial passages down into the stem. X 4 (enlargement fraction omitted on plate). 

 Kaskaskia Gr. ; Upper beds, Lower Carboniferous. Pulaski County, Kentucky, 

 unless otherwise stated. 



All specimens, except those of figs, i and 8, are in the author's collection. 



