DESCRIPTION OF 



PLATE XVII. 



Page 

 Fig. 1. lORBESIOCRINUS SHUMARDIANUS. 671 



' 



1. View of the anterior side of specimen, showing the truncated subradial 



plates. 



Fig. 2 & 4. FORBESIOCRINUS GIDDINQEI. 633 



2. View of the anal and postero-lateral side of specimen. 



4. Diagram of plates enlarged, showing their form and arrangement; those 



of the anal area being determinable only on one side. 



Fig. 3. FORBESIOCRINUS MEEKI. 631 



3. View of the base, showing the column, the subradial and radial plates, 



with those of the first division of the rays, which in four of the rays 

 are three below the second bifurcation. 



Fig. 5. FORBESIOCRINUS WORTHENI. 632 



5. Basal view of the specimen, as it lies expanded on the surface of the 



stone. 



Fig. 6. SCAPHIOCRINUS DACTYLIFORMIS. 670 



6. The anterior and antero-lateral rays of the specimen, with a part of the 



adjacent rays. 



Fig. 7. POTERIOCRINUS MISSOUR1ENSIS. 669 



7 a. A specimen showing the anal side, with a few joints of the column and 

 the lower part of the arms, and a part of the proboscis. 



7 b. Enlargement of the plates of the proboscis, showing the pores between 

 the alternate ranges. 



Fig. 8 & 9. SYNBATHOCRINUS SWALLOVI. 672 



8. A specimen somewhat distorted from pressure, with arm-joints less dis- 



tinctly angular than in the other specimen. 



9. A specimen preserving a portion of the column, and having the summit 



broken away. 



