195 
but in the Derbyshire encrinite, as far as can be judged from this 
specimen, hardly any two of the arms divide alike. Indeed, so irre- 
gular is their division, as to render it very difficult to give an idea of 
it by words. In some of the arms the division takes place very low, 
even at the third, and in others not until they have reached the se- 
venth or eighth articulation. Unlike, too, to what takes place in the 
lily encrinite, the fingers, which are formed by this division, divide 
and subdivide, and that, apparently, not in any particular order ; one 
of the fingers of the same arm appearing to pass undivided to its 
termination, whilst its fellow finger suffers a still further division. 
How many divisions actually take place before their termination is 
completed cannot be determined by the present specimen, since full 
a third part of it is concealed by being immersed in its matrix ; nor can 
any thing be said of its tentacula, excepting that analogy will lead us to 
conclude that they are nearly alike in form and arrangement to those of 
the lily encrinite. 
I had already remarked that the contour of the pentagonal base of 
this species which I had first noticed, Plate XV. Fig. 2, differed from 
that of the lily encrinus in being more rounded ; and by the specimen 
of Mr. Stevens, it is seen that this circumstance results from its adaptation 
to the general form of this species, which is characterized by its rounded 
and pyriform figure. 
With respect to the lower extremity of this species, I do not know 
that any conjecture has been made, as to the form it assumes : I, how- 
ever, have some reason for suspecting that the spathose fossil, Plate XIV. 
Fig. 5, is a polished section of this part. It was originally in the 
collection of Mr. Strange, but where it was obtained from I have had no 
opportunity of knowing. 
This fossil has been ^longitudinally divided, so that the section 
shews a trunk, which seems to have been transvei’selv divided, at small 
distances, and from which appear to have proceeded cup-formed la-^ 
mellae, disposed like those of a tunicated bulb. These have been 
