PLATE XXVII. 



Pyrina parryi Hall (p. 67). 



IT. S. Nat. Mus. 9854. 



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. 

 If. Portion of ambulacrum, X 1. 

 Ig. Two interambulacral plates, X 3. 

 Ih. Portion of interambulacral plate, 

 li. Apical system, 

 lj. Portion of madreporite. 



Echinobrissus ANGUSTATUS Clark, n. sp. (p. 69). 

 Johns Hopkins Univ. T 3009, type. 



Figure 2a. Upper surface of the test. 

 2b. Lower surface of the test. 

 2c. Lateral surface of the test. 



Cassidulus conoideus Clark, n. sp. (p. SO). 

 U. S. Nat. Mus. 31199, type. 



Figure 3a. Upper surface of the test. 

 3b. Lower surface of the test. 

 3c. Lateral surface of the test. 

 3d. Posterior surface of the test. 

 256 



