PLATE LXXIX. 

 Oligopygus floridanus Twitchell, n. sp. (p. 169). 



U. S. Nat. Mus. 164G60, typo. 



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. Apical system, X 4}. 

 If. Part of one ambulacrum, X 10. 



Cassidttlus (Pygorhynchtjs) georgiensis Twitchell, n. sp. (p. 170). 

 U. S. Nat. Mus. 164347, type. 



Figure 2a. Upper surface of the test. 

 21) . Lower surface of the test. 

 2c . Lateral surface of the test. 

 2d. Posterior surface of the test. 



Cassidulus (Pygorhynchtjs) gottldii (Bouve) (p. 171). 

 Boston Soc. Nat. Hist. 1756, specimen A, 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. 

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