PLATE XLIX. 



Hemiastkr CALiFORNicus Claik (page 90). 



Fig. la. Upper surface of the test. 

 lb. Lower surface of the test. 

 Ic. Lateral view of the same. 



Hkmiaster Calvini Clark (page 90). "* 



Fig. 2a. Upper surface of the test. 

 2b. Lower surface of the same. 

 2c. Lateral view of the same. 

 2d. Posterior view of the same, 



2e. Several plates from the petaloidal region of the right postero-lateral ambu- 

 lacrum, highly maguitied. 

 2/. Same, lower portion of petaloidal region. 

 2g. Several plates from anterior ambulacrum. 

 2/(. Interambulacral plate, enlarged. 

 2i. Apical disk, enlarged. 

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