nal, cylindrical, or oval vertebra, with radiated or stelliform articular 

 surfaces, compose a trunk, supporting a pelvis, from which proceed Jive 

 arms, terminating in fingers and numerous tentacula. 



The first species which we shall examine, is that which, from the lily- 

 like form yielded by its closed arms, has been hitherto distinguished as 

 the Encrinus, Lilium lapidium, or Stone Lily. 



The LILY ENCRINITE is distinguished by each of its arms, dividing 

 into a hand, formed of two fingers, from the inside of which proceed ar- 

 ticulated tentacula : the whole folding up in the form of a closed lily. 



The vertebrae, forming the trunk of this species, appear, from the 

 examination of several specimens, in which the vertebrae and pelvis 

 of the animal are united, to be the trochitae, figured Plate XIII. Fig. 

 1, 2, 8, 19, 43, 44, as are shewn in the outline sketch, supposed to 

 be continued from the specimen, Plate XIV. Fig. 1. 



As these vertebrae approach to the body of the encrinus, a cu- 

 rious change is observable: the crenated surface gradually quits 

 the centre, and a slight stelliform figure assumes its place. Thus the 

 vertebra attached to the body of the encrinus obtains a stelliform sur- 

 face, fitted to articulate with the stelliform surface which always ex- 

 ists in the centre of the pentagonal base of the pelvis: An idea of 

 the manner in which this change takes place may be obtained by in- 

 spection of the trochites, Plate XIII. Fig. 19- 



By the vertebrae, three in number, which are yet adhering to the 

 pentagonal base of a very perfect encrinite, I am enabled to per- 

 ceive that the third vertebras has a slight approach to the pentagonal 

 form, the effect of five slight indentations on its sides. Its edge is 

 slightly crenated, and it bears slight traces of five radii on its sur- 

 face. The second vertebra, with which this articulates, is larger, and 

 has also a little of the pentagonal form. Its sides are rather tumid, 

 and its border, which is broad, receives within its inner eclge the 

 third vertebra on the one side, and on the first the other side, which 

 is similar in form to the third, and doubtlessly bears a star-like ira- 



