PLATE XII. 



Salenia texana Credner (p. 49). 

 U. S. Nat. Mus. 8329, specimen A. 



Figure la. Lateral view of the test slightly enlarged. 



lb. Upper surface of the test restored, slightly enlarged. 



lc. Lower surface of the same. 



Id. Lateral surface of the same. 



le. Interambulacrum, X 3. 



If. Ambulacrum, X 4. 



lg. Portion of the same, X 10. 



lh. Tubercle. 



li. Apical system, X 1£- 



