174 
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 lapideum, 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 articu^ 
culated tentacula : the whole folding up in the form of a closed lily. 
The vertebrsB, 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 XIIL 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 exists 
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 inspection of the 
trochites, Plate XIIL 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 vertebrae 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 edge the 
third vertebra on the one side, and the first on the other side, which 
is similar in form to the third, and doubtlessly bears a star-like im- 
