PLATE LXVIII. 



Bkeynella gregoryi Twitchell, n. sp. (p. 148). 

 Am. Mus. Nat. Hist., type. 



Figure la. Upper surface of the test. 

 lb. Lower surface of the test, 

 lc. Posterior surface of the test. 

 Id. Lateral surface of the test, 

 le. Apical system, X 6. 

 If. Part of ambulacra. 



ECHINOLAMPAS APPENDICULATUS EmmOllS (p. 149). 

 U. S. Nat. Mus. 138017. 



Figure 2a. Upper surface of the test. 

 2b. Lower surface of the test. 

 2c. Posterior surface of the test. 

 2d. Lateral surface of the test. 

 2e. Part of floscelle, X 4. 

 2f . Apical system, X 5. 

 2g. Part of interambulacra. 

 2h. Part of ambulacra, X 10. 



297 



