364 PROCEEDINGS OP THE ACADEMY OP [1885. 



EXPLANATION OF PLATE IX. 



Pig. 1. Diagram of the calyx plates of Acrocrinus Wortheni. 



Fig. 2. Interior view of Glyptocrinux ramulosus. The specimen is broken 

 in halves, exposing the inner surface of the test, and it shows the con- 

 tinuity of the interradials from the dorsal to the ventral side, the pres- 

 ence of galleries lodging the ambulacra, and the absence of covering 

 pieces in the test ; also the apparent existence of a calcareous perisome, 

 supported by pillars as in the Actinoerinidae. — From a specimen in the 

 Canada Survey Museum. 



Fig. 3. Side view of Zeacrinus nodosus. 



Fig. 4. Sde view of Atelestocrinus robustus. 



Fig. 5. Doi sal aspect of Cleiocrinus regius. After a drawing by Mr. Walter 

 R. Billings from type specimen. Basals and underbasals indicated by 

 di itted lines. 



Fig. 6. Side view of Platycrinus burlingtonensis. 



Fig. 7. Side view of Stemmatocrinus Traulscholdi. 



FlG. 8. Internal view of the same. S. Face for the attachment of the in- 

 terradials. 



