/ 
ccl APPENDIX. 
calcareous rock, in some specimens from Prince Regent’s Inlet, abounds 
with parts of the jointed stem and single joints of a zoophyte belonging to 
the natural order of Encrini ; other specimens appear to be entirely without 
these bodies : but on subjecting the different varieties ofaggregation to a closer 
examination, it will be found that those which contain no remains mani- 
festly belonging to the just mentioned organized fossil bodies, are, never- 
theless, entirely composed of their detritus. This encrinitic mass, in single 
specimens, might readily be mistaken for a friable variety of common granular 
limestone, did not a comparison of a series of specimens prove that appear- 
ance to be produced by the extreme comminution of the substance of those 
fossil zoophytes, each particle of which still exhibits planes of cleavage 
parallel to the primitive rhombohedron. 
The joints of the stem and branches of the zoophyte which appears to 
have thus largely contributed to the formation of this mass, are mostly cylin- 
drical ; their thickness is in an inverted ratio with that of the column of which 
they form parts ; those near the body being the largest and thinnest. Cylin- 
drical portions of the stem, formed by these thinner vertebrae, exhibit on 
their surface hemispheric concavities, some of them large enough to occupy 
from four to six of the thin joints or vertebrae, the lines of separation of which 
are seen to traverse the cavities in a horizontal direction. They are the 
sockets of articulation, in which the branches of the stem were inserted. 
The casts produced from these concavities in the surrounding mass, might, 
when seen without their moulds, be easily mistaken for distinct organic 
remains. There is little doubt that this zoophyte is related to some of 
those encrinites of which parts of the stem and branches so frequently occur 
in the transition limestone of Gothland. It seems to me also probable that 
many of the screw stones (Epitonium, L.) owe their origin to the decompo- 
sition of the stems of species belonging to this genus. 
Another species of a genus of zoophytes, peculiar to the transition 
limestone, was found by Captain Parry, in Prince Regent’s Inlet, at the 
foot of a high hill. It is a fine Catenipora, which appears to be quite dis- 
