PLATE XLVIII. 



Hemiaster HrMPHRKYHANUS (Meek aud Haydeii) (page 88). 



Fig. la. Upper surftice of the test. 

 lb. Lower surface of the test, 

 lo. Lateral view of the same. 

 Id. Posterior view of the same. 



le. Several plates from the petaloidal region of the right jjusterior lateral am- 

 bulacrum, highly magnilied. 

 If. Ditto, anterior ambuhicnim. 



Hkmiastki; Dai.li Clark (i>age 89). 



Fig. 2a. Upper surface of the test. 

 2h. Lower surface of the test. 

 2c. Lateral view of the same. 

 2d. Posterior view of the isame. 



2e. Several plates from the petaloidal jiortiou of the left antero-lateral ambu- 

 lacrum. 

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