PLATE XLIX. 



Hemiaster texanus Roemer (p. 94). 



Johns Hopkins Univ. T 3013. 

 Figure la. Upper surface of the test. 



lb. Lower surface of the test restored, X 1J. 



lc. Lower surface of the test, ditto, X li. 



Id. Lateral surface of the test, X li. 



le. Posterior surface of the test, ditto, X H. 



If. Several plates from the petaloidal region of the right posterolateral ambulacrum, X 8. 



lg. Same, anterior ambulacrum, X 8. 



lh. Apical system, X 5. 



li. Lateral view of a tubercle, X 20. 



Ij. Tubercle from above, X 20. 



Hemiaster humphreysanus Meek and Hayden (p. 95). 



U. S. Nat. Mus. 331, 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. 



2e. Several plates from the petaloidal portion of the left anterolateral ambulacrum, X 8. 

 2f . Several plates from the petaloidal portion of the anterior ambulacrum, X 8. 

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