PLATE XLVI. 



Hemiaster bexaei Clark, n. sp. (p. 



U. S. Nat. Mua. 8330, 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, 

 le. Portion of ambulacrum, X 5. 



Hemiaster comanchei Clark, n. sp. (p. 90). 



Johns llopkins Univ. T 3012, type. 



Figure 2a. Upper surface of the test. 

 2b. Lower surface of the test. 

 2c. Lateral surface of the test. 

 2d. Posterior surface of the test. 



