380 Mr. Cumberland on a new Pentacrinus from Lyme , 
(see fig. 4, Plate 22) each division being bounded by a circular ex- 
terior, and between each division, as in the Briarean , there issue 
feelers, which this specimen shews must have been short, and of a 
form little diminishing, each occupying the groove from whence 
they issue when folded up. 
The order of arrangement of the Troqhita is a repetition of four : 
the first of considerable thickness, projecting most, and thickest in 
the grooves ; beneath this reposes a thin one about one-third the 
thickness of the first mentioned trochite, which is separated from 
another of the same size and form by a middle joint of about half 
the thickness of the first, and which recedes a little in the column. 
Of the number of the joints of the feelers I am notable to judge, not 
as yet having seen any that amounted to more than ten. It was 
found in the same limestone as the Briarean for which Lyme is so 
celebrated, and most resembles a Pentacrinus which is in the British 
Museum, brought from Boll in Germany, but, I believe, has never 
been seen before in our limestones. 
The annexed drawing (Plate 23, fig. 1) is from a new and very 
peculiar species of Encrinus, whose arms are doubled only once, and 
the joints of which very much resemble the Isis coral : parts of these 
arm joints I have found in the Severn lias, but this is in another 
species of limestone more resembling our transition rock, and al- 
though I am not yet informed of its locality, I strongly suspect it 
to be from the Severn sea. 
The spherical body connected with it seems extraneous. 
Fig. 2, 3, 4, & 5, Plate 23, represent correct drawings, in three 
points of view, of a separated pelvis belonging to the Briarean Pen- 
tacrinus, in which the insertion of the stem into the five bracket- 
