428 
STRUCTURE OF CRINOIDEANS. 
varying in number and holding the same place 
between the column and the arms of the animal, 
may be traced through each species of the family 
of Crinoideans. The details of all these specific 
variations are beautifully illustrated by Mr. 
Miller, to whose excellent work I must again 
refer those who are inclined to follow him, 
through his highly philosophical analysis of the 
structure of this curious family of fossil animals.* 
still folded up. Fig. 3 is a side view of one of the fingers with 
its tcntacula. Fig. 4 represents the interior of the body which 
contained the viscera. Fig. 5 represents the exterior of the 
same body, and the surface by which the base articulates with 
the first joint of the vertebral column. Figs. 6, 7, 8, 9, repre- 
sent a dissection of the four series of plates that compose the 
body, forming successively the scapulee, upper and lower costal 
plates, and pelvis of the animal. Fig. 10 is the upper extremity 
of the vertebral column. Fig. 11 represents the upper surfaces 
of the five scapulte, showing their articulations with the inferior 
surfaces of the first bones of the arras. Fig. 12 is the inferior 
surface of the same series of scapular plates, showing their arti- 
culations with the superior surfaces of the upper or second series 
of costal plates, Fig. 13. Fig. 14 is the inferior surface of Fig. 
13, and articulates with the first or lower series of costal plates. 
Fig. 15. Fig. 16 is the lower surface of Fig. 15, and articulates 
with the upper surface of the bones of the pelvis, Fig. 17. Fig. 
18 is the inferior surface of the pelvis. Fig. 17, and articulates 
with the first or uppermost joint of the vertebral column, 
Fig. 10. 
* Our PI. 47 gives Mr. Miller’s restoration of two other 
genera ; fig. 1 , the Apiocrinites rotundus, or Pear Ecrinite, with 
its root or base of attachment, and its arras expanded. Fig 2 
is the same with its arms contracted. Two young individuals 
and the broken stumps of two other small specimens, are seen 
fixed by their base to the root of the larger specimens, shewing 
