201 



Plate XV. Fig. 7> is part of the mass belonging to the superior part 

 of the animal, which is proved by the body part, or pelvis, being 

 imbedded in it, and being surrounded by a confused mass of minute 

 ossiculse, which had formed the arms, fingers, &c. of the animal. As 

 in the skeleton of the body part of the other encrinites, so we find in 

 the skeleton in this specimen, that the first of the vertebra? is sur- 

 rounded by five bony plates, which, in the account given of the pre- 

 ceding species, were considered as ribs : but the similarity of struc- 

 ture ceases here, the remaining parts of the skeleton being essentially 

 different. 



Each of the ribs, viewed externally, the only view which I have 

 hitherto obtained of them, presents a roundish flattened surface, ter- 

 minated by six articulating edges. The first of these, the inferior 

 concave edge, is that which surrounds the external surface of the 

 first vertebra. This edge is on- a line which forms the fifth part of 

 the internal and smaller circle of the pelvis. Opposite to this, is the 

 exterior convex edge, on which the compound clavicle of this species 

 articulates ; this edge forms also the fifth part of a circle, but is ne- 

 cessarily larger than the former, as it includes the more external part 

 of the pelvis. 



The ends of each rib terminate in two obliquely disposed edges, 

 forming the articulation by which the ribs themselves are connected 

 together. By a truncation, as it were, of the angle resulting from the 

 edge just described, and of the superior edge, an oblique edge is 

 formed, which, with that on the corresponding part of the adjoining 

 rib, leaves a triangular cavity immediately over the commissure of the 

 ends of the ribs. In this triangular cavity, is placed the inferior ter- 

 mination of an oblong body, which appears to have had an analo- 

 gous office, with that which was considered as the scapula in the lily 

 encrinite ; since to its superior part, the arms, fingers, &c. of the ani- 

 mal appear to have been attached. 



Between each of these five scapula?, and on the superior edges of the 



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