PLATE XXVIII. 



Cassidulus florealis (Morton) (page 66). 



Fig. la. Upper surface of the teat. 

 16. Lower surface of the test. 

 Ic. Lateral view of the same. 

 Id. Posterior view of the same. 

 le. Right postero-lateral ambulacrum. 



If. Several plates in the petaloiclal region of the same, much enlarged. 

 Ig. Ditto, lower surface, 

 l/i. Posterior iuterambulacrnm. 

 li. Single plate, much enlarged. 

 1;. Apical disk, highly magnified. 

 IJi. Tubercle from above. 

 II. Lateral view of the same, 

 160 



