PLATE XXXIX. 



HoLASTKK SIMPLEX Shuiuard (page 76). 



Fig. la. Lateral view of the test. 

 lb. Posterior view of the same. 

 Ic. Interambulacral plate, much enlarged. 

 Id. Tubercle, highly magnified. 



ENAI.LASTEK TEXANUS Roemer (page 78). 



Fig. 2a. Upper view of the test. 

 2b. Lower view of the test. 

 2c. Lateral view of the same. 

 2d. Posterior view of the same. 

 2e. Portion of the petaloidal region of the right antero-lateral ambulacrum, 



much enlarged. 

 2/. Ditto, anterior ambulacrum. 

 2g. Apical disk, enlarged. 

 182 



