PLATE XL. 



Enallasteu obliquatus Clark (page 79). 



Fig. la. Upper surface of the test. 

 lb. Lower surface of the test. 

 Ic. Lateral view of the same. 

 Id. Posterior view of the same. 



le. Portion of the petaloidal region of the anterior ambulacrum. 

 If. Ditto, left anterior ambulacrum. 

 Ig. Second plate of the same from the mouth opening. 

 1/i. Diagram sliowing arrangement of plates about the mouth opening. 

 It. Apical disk, enlarged. 

 Ik. Tubercle from above, much enlarged. 

 11. Lateral view of the same. 

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