PLATE XL VI. 



Hemiaster STELLA (Morton) (page 84). • 



Fig. la. Upper surface of the test. 

 lb. Lower surface of the test. 

 Ic. Lateral A^iew of the same. 

 Id. Posterior view of the same. 



Heml\steh ungula (Morton) (page 85). 



Fig. 2a. Upper surface of the test. 

 2b. Lower surface of the test. 

 2c. Lateral view of the same. 

 2d. Posterior view of the same. 

 2e. Portion of the petaloidal region of the right antero-lateral ambulacrum, 



much enlarged. 

 2/. Ditto, anterior ambulacrum. 

 2g. Apical disk, enlarged. 

 196 



