m 
by the annexed figure, Plate XV. Fig. 3, the central pentagonal 
part projecting in a more rounded form, and with the same sweep 
with the five surrounding and including pieces ; whilst, in the corre- 
sponding base of the former species, the central part is considera- 
bly sunk. 
What was the form of the rest of the pieces constituting the pelvis 
for the reception of the body of the animal ; or what was the shape 
of the ossiculse forming the arms, fingers, tentacula, &c. ; or in what 
manner these were given off and divided, are questions which I 
do not possess the means of solving. Numerous ossiculee, however, 
are observable on the surface of the matrix ; but their forms are 
not seen with sufficient distinctness to allow them to be clearly 
made out. 
Whilst this sheet was in the hands of the printer, I was favoured 
with a letter from Stevens, Esq. of Bakewell, near Chatsworth, 
informing me that he was in possession of the only head, or superior 
part of the Derbyshire encrinite, that he had heard of. The sketch 
which Mr. Stevens sent at once assured me that this encrinite differed 
essentially in its general form, as well as in the arrangement and 
division of its limbs, from any encrinite which I had seen. Anxious to 
fill up the chasm which existed in the natural history of this curious 
animal, I gladly accepted of this gentleman’s very obliging offer of the 
opportunity of having a drawing made from his specimen, and of 
presenting to my readers its correct representation, Plate XV. Fig. 9. 
This fossil presents, at first sight, a sufficient difference in its general 
outline to authorize the conclusion of its being of a different species from 
the lily encrinite of Germany. 
By a closer examination of this interesting fossil it will be seen 
that from a pentagonal base, similar to that which has been just de- 
scribed, as the supposed pentagonal base of this encrinite, ten arms 
proceed, as in the lily encrinite, but which soon assume a very diffe- 
rent character from those of that fossil. In the lily encrinite, each 
of the arms divides at the same distance, and in the same manner ; 
