PLATE XCVIII. 



ECHINOCARDIUM ORTHONOTUM CoiU'ad (p. 214). 



Am. Mus. Nat. Hist. 

 Figure la. Upper surface of the test, 

 lb. Lower surface of the test. 

 lc. Anterior surface of the test. 



Echinocardium orthonotum Conrad (p. 214). 



Johns Hopkins Univ. T 1002. 

 Figure 2a. Upper surface of the test. 

 2b. Lower surface of the test. 

 2c. Lateral surface of the test. 



Echinocardium depressum Clark, n. sp. (p. 214). 

 U. S. Nat. Mus. 164454, type. 



Figure 3a. Upper surface of the test. 

 3b. Lower surface of the test. 

 3c. Lateral surface of the test. 



Linthia (?) californica Weaver (p. 214). 

 Univ. California, type. 



Figure 4. Upper surface of the test. 



