PLATE LXIX. 



Hemipatagus argutus Clark, n. sp. (p. 150). 



U. S. Nat. Mus. 141107, type. 



Figure la. Upper surface of the test, 

 lb. Lower surface of the test, 

 lc. Lateral surface of the test. 

 Id. Posterior surface of the test. 



Hemipatagus subrostratus Clark, n. sp. (p. 151). 



U. S. Nat. Mus. 164652, type. 



Figure 2a. Upper surface of the test. 

 2b. Anterior surface of the test. 



Schizaster lecontei Merriam (p. 151). 

 Univ. of California, type. 



Figure 3a. Upper surface of the test. 

 3b. Lower surface of the test. 

 29S 



