Figure 1. Portion of test. 



PLATE LXXIII. 



CiDARIS MOKTONI Conrad (p. 157). 

 Boston Soc. Nat. Hist. 1555. 



Cidaris smithi Clark, n. sp. (p. 157). 

 Alabama Geo!. Survey, type. 



Figure 2a. Upper surface of the test. 

 2b. Lower surface of the test. 

 2c. Lateral surface of the test. 



Figure 3. Spine. 



Figure 4. Portion of the test. 



Figure 5. Spine. 



Cidaris smithi Clark, n. sp. (p. 157). 



Alabama Geol. Survey. 



Cidaris geoegiana Clark, n. sp. (p. 158). 



U. S. Nat. Mus. 166485, type. 



Cidaris branneei Arnold (p. 158). 

 Leland Stanford Junior Univ. 1056, type. 



Ccelopleueus aldeichi Clark, n. sp. (p. 15£ 



U. S. Nat. Mus. (Aldrich), type. 



Figure 6a. Upper surface of the test. 

 6b. Lateral surface of the test. 



Ccelopleueus aldeichi Clark, n. sp. (p. 158). 

 U. S. Nat. Mus. ( Aldrich). 



Figure 7a. Upper surface of the test. 

 7b. Lower surface of the test. 

 7c. Lateral surface of the test. 



Gagaria Americana Clark, n. sp. (p. 159). 

 U. S. Nat. Mus. (Aldrich), type. 



Figure 8a. Upper surface of the test. 

 8b. Lateral surface of the test. 

 302 



