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in all the plates the analogous parts in each species of Crinoidea, the 

 Marsupites, and Comatulse. Their application is as follows : 



A Superior portion of the animal. 



JE Column. 



B Base of attachment. 



C Fibres of attachment. 



D Auxiliary side arms. 



E Pelvis. 



F Costal plate or joint. 



G Intercostal plate or joint. 



H Scapula. 



I Interscapulary plate or joint. 



J Irregular interscapulary plate. 



K Arms. 



L Cuneiform joint. 



M The hand. 



N The Finger. 



O Tentacula. 



CE Excavation in the arm joints, fingers, and tentacula, for the passage of 



viscera, covered by the plated integument. 

 P Clavicle. 

 Q Pectoral plates. 

 R Capital plates. 

 S Mouth capable of being protruded into an elongated proboscis, by the 



sphincter contraction of the plated integument. 

 T Plated integument covering the abdominal cavity, and the excavation in 



the arms, fingers, and tentacula. 

 V Alimentary canal. 

 U Exuded indurated calcareous matter. 

 UE Entrance to the alimentary canal. 

 W Impression of the auxiliary arm joints on the column. 

 X Orifice of the mouth. 

 Y Supposed aperture of the ovary. 

 Z Undeveloped muscular cartilaginous parts. 



u 



