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EXPLANATION OF PLATF. 47. 
The length of the jointed flexible stems has been 
taken from some entire stems in the collection of 
Mr. Channing Pearce of Bradford, near Bath. Two 
young individuals are attached to the calcareous 
Pedicle or Base of the largest specimens. (Miller.) 
Fig. 2. a. represents the remedial effect of calcareous 
secretions in repairing an injury of the joints of the 
stem. (Miller.) 
Fig. 3. Pyriform Body of Apiocrinites rotundus, shew- 
ing at its upper extremity the internal disposition of 
the bones surrounding the cavity of the stomach. 
(Original.) 
Fig. 4. Vertical section of another pyriform Body, shew- 
ing the cavity of the Stomach, and a series of lower 
cavities, or hollow lenticular spaces, between the 
central portions of the enlarged joints of the upper 
portion of the vertebral column. Miller considers 
these spaces as enlargements of the alimentary canal, 
which descends through the axis of the entire co- 
lumn. 
The surfaces of the joints of the vertebral column 
are striated with rays, which articulate with corres- 
ponding rays on the adjacent Plates, and allow of 
flexure without risk of dislocation ; locking into one 
another nearly in the same manner as those figured 
in PI. 49. Figs. 5. 7. 9. (Original.) 
Fig. 5. Restored figure of Apiocrinites, 30-Dactylus, 
copied from Miller’s Crinoidea, Page, 96, PI. 1. 
Fig. 2. (See Y. 1. p. 429. Note.) 
B. Base and fibres of attachment. 
D. Auxiliary side Arras*. 
* These side arms afford a beautiful example of mechanical adap- 
tations and compensations, vviiich are thus described by Mr. Miller 
