﻿PLATE LXII. 



MlCRASTER C0R-ANGUINUM, Klein. 



From the Upper Chalk. 



1 a. Test, upper surface, natural size. My collection. 



b. Do. under do. do. 



c. Do. lateral view do. 



d. Do. posterior do. do. 



e. Do. anterior do. do. 



/. Ambulacral and inter-ambulacral plates, magnified three times. 



g. Apical disc, highly magnified. 



h. Lateral ambulacra, magnified four diameters. 



*. Anterior single ambulacrum, magnified four diameters. 

 Jc. Structure of the sub-anal fasciole, magnified. 



Structure of tubercles, bosses, and granules, magnified. 



3. Portion of a spine adherent to the test do. 



4. Do. do. do. do. 



5. Spine found on the test do. 



