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inclined to consider it as belonging to that genus, naming it ACTINOCRINITES 
MONILIFORMIS, from the moniliform figure ofits columnar Joints, which preserve 
that shape throughout the column, although alternatel y larger aud smaller near 
the pelvis. It is a large species appertaining to the transition and perhaps 
Mountain limestone, in which latter I have seen columns much resembling 
these. It must be widely distributed, as I have seen its columns on slabs of 
Mountain limestone from Swaledale, in Yorkshire, and onslabs of transition 
lime from Foulhope, the Malvern Hills, Gliddenbill, Shelly Island, Lake 
Huron, in Canada, and Melville Island, in the arctic regions. Mr. PARKINSON 
who has seen the specimen in Mr. Hawxer’s collection, informs me that it is 
illustrative of what he calls the Plumose Encrinite, and which was in Sir Asu- 
TON LEvER’s collection. : : 
9. In the green sand formation, near Warminster, occur portions of a 
Pentacrinite, (fig. 18.) with a rounded column, showing very little of the effects 
of contraction in the interstices between the pentapetalous formations. These 
columns display in some specimens an alternation of thicker and thinner joints, 
and in others show a uniform thickness, the result of growth, as explained 
before. At intervals larger joints are interposed, marked externally by five 
_ transverse oblong depressions, from which round auxiliary side arms proceed. 
I consider this a distinct species, to which I would assign the name 
PENTACRINUS MONILIFORMIS, from the bead-like shape of the interposed large 
joints. 1 
10. Very minute Crinoidal auxiliary side arms no thicker than a hair, 
occur with retepora, Ke. on slabs of Mountain limestone, from Mitchel Dean. 
(fig. 19.) They are excessively small, show but obscure marks of organization, 
and are changed into spar. One specimen is bent into a hook. 
11. I understand Mr. James Sowersy, has found Crinoidal remains in the 
London clay at Highgate, which I have not seen, and hence am unable to speak 
to their generic and specific identity. 
12. In the slaty gray-wacke where it comes in contact with the lower beds 
of the transition limestone, occur the impressions of numerous organic re- _ 
mains and Crinoidea, the substance of which has been decomposed and removed. 
It is perhaps owing to a contraction or compression of this slaty formation, that 
the Crinoidal impressions thus found have generally an elliptical form. Where 
