the fingers, and of the tentacula, between the lily encrinite and the 

 Briaracn pentacrinite : these partaking of the great length of those in 

 the latter fossil ; whilst, like those of the Lily Encrinite, they appear to 

 have been capable of being contracted into the form of a closed 

 flower. The arms and fingers are much more slender than in the lily 

 encrinus ; and the articulated tentacula, which are arranged along 

 the whole length of the fingers, have very much the appearance of the 

 terminations of the abovementioned pentacrinite. It is much to 

 be regretted, that the parts forming the pelvis are not discoverable 

 in this specimen ; in consequence of which, no correct opinion can be 

 formed, respecting the modes in which the arms were given off from 

 the pelvis, or of the manner in which this was united to the vertebral 

 column. For a particular account of this curious fossil, I must refer 

 you to the subjoined information respecting it with which I have been 

 favoured by Mr, Donavan. 



" PLUMOSE ENCRINUS. 



" A large flat piece of compact grey limestone, of nearly a triangu- 

 lar form, and very uneven surface, at its greatest extremities, 10 inches 

 by 81. In one part of this is imbedded an encrinus, having a great 

 number of long arms or rays, each furnished with numerous delicate 

 tentacula or claspers, disposed like the feathery appendages on the 

 quill of a pen, and on account of which resemblanceit has been named 

 ENCRINUS PENNATA. Fourteen of these arms are visible, or maybe 

 traced, on one side of the stone, and sixteen or more on the other. 

 Some of these arms being in relievo on the surface, shew the tentacu- 

 la very distinctly and fine; others are partially concealed in the stone. 

 Near these are a number of the finer or extreme parts of other arms 

 of a similar structure. The arms are cylindrical, and composed of a 

 great number of flat joints with a rounded edge, the largest about 



