PLATE 5, 
Fig. 1-4. 
Platycrinus tentaculatus. 
Pago 
IIP. 
1. The individual represented of the natural size. 
2. Enlargement of arms and tentacles from the second radial plate; the two contiguous arms 
of the two pairs being continued with the tentacles as far as seen in the specimen. 
3. Enlargement of the plates from the basal through the radial and brachial plates, and con¬ 
tinuation of a single arm. 
4. Diagram showing the structure. 
Fig. 5, 6, 7. Braciiiocrinus nodosarius. 118 
5. A specimen with the tentacles more closely arranged than usual, and terminating below in 
a round condyle-like extremity. 
G. A specimen preserving eight of the tentacles upon one side of the arm, and four upon the 
other. 
7. An arm coiled, showing the points of attachment, with numerous detached fragments of 
tentacula. 
Fig. 8 - 12. Epriocrinus pocilliformis. 121 
8 Basal view of a large individual, the proportional length being greater than usual. 
9. Lateral view of the same. 
10. Lateral view of a larger specimen. 
11. Interior of the same. 
12. Enlargement of the concavity of fig. 10, showing the depressions corresponding to the 
depressions in the margin and the concentrically striated surface. At each angle there is 
a slight depression or pore, which seems to communicate with the cavity between the 
basal and inner plate. 
Fig. 13 & 14. Aspidocrinus callosus. 123 
13 &. 14. Interior and exterior views of the specimen described. 
Fig. 15 - 18. Aspidocrinus scutelliformis. 122 
15. The exterior of the base of an individual of this species. 
16. The interior of the same. 
17. Profile or lateral view of the same. 
18. The interior of a large specimen. 
Fig. 19 & 20. 
Aspidocrinus digitatus. 
123 
19 &c 20. Upper side and profile view of the specimen. 
