PLATE L. 



Hemiaster califoenicus Clark (p. 96). 

 U. S. Nat. Mus. 31203, type. 



Figure la. Upper surface of the test. 



lb. Upper surface of the test, restored, 

 lc. Lower surface of trie test. 

 Id. Lateral surface of the test. 



Hemiaster beecheri Clark, n. sp. (p. 96). 



Peabody Museum, Yale University, 1863, type. 



Figure 2a. Upper surface of the test. 

 2b. Lower surface of the test. 

 2c. Lateral surface of the test. 



Hemiaster lacunostts Slocum (p. 97). 



U. S. Nat. Mus. 31204, type. 

 Figure 3a. Upper surface of the test. 

 3b . Lower surface of the test. 

 3c . Lateral surface of the test. 

 3d. Posterior surface of the test. 



