PLATE XVII. 



FIG. 1. Part of a nave encrinite, with a circular central opening, the carpal bones * of 

 which much resemble those of the specimen, Fig. 10, taken from Dr. Ca- 

 peller's plate. 



2. Part of another encrinite, differing from the former in the size and form of its 



plates, and in having a stellated central opening. 



3. The nave encrinite. This figure was taken from the original specimen in the 



British Museum. The opening at the superior part I believe to be the effect 

 of injury. 



4. Part of another encrinte, which seems to have very much resembled the preced- 



ing specimen. 



i 



5. Part of another encrinite, which appears to have much resembled the two former 



specimens. 



6. A vertebral column of a pentacrinite, from Yorkshire. 



7. A vertebral process, or appendix, of the Gloucestershire pentacrinite. 



r ., . , T i ' > ,1 r-i i 



S. A part of the vertebral column of the Gloucestershire pentacrinite. 



9. The superior extremities of the pentacrinite in an extended state. 



10. A sketch of an encrinite, taken from Fig. 3, of a plate of Dr. Capeller. 



11. A part of the vertebral column of a pentacrinte, supposed to be from Yorkshire. 



12. The superior part of an encrinite, in the British Museum, from Ireland. 



13. One of the ossiculse, of the arms of the pentacrinite, of its natural size, and 



slightly magnified. 



14. One of the ossiculae of the vertebral processes, of the natural size, and slightly 



magnified. 



15. The superior part of the briaraean pentacrinite, 



it, the scapulae. 



b, the clavicle. 



c, the first bone of the arm. 

 </, the second bone of the arm. 



e, the commencement of two series of bones, attaclied to the superior part 

 of the last bone of the arms, analagous with what has been seen to take 

 place in most of the encrinites. 



16. The vertebral column of the briaraean pentaerinte, with the articulated vertebral 



processes. 



17. The termination of one of the vertebral articulated processes, slightly magnified. 



* The propriety of the term carpal bones, will appear when the forms of these bodies 

 are attended to, and especially when it is observed that these bones, like the carpal, con- 

 nect the fingers with the arm, 



VOL. II S S 



